bluuebunny/crossref_metadata_2025_split huggingface dataset:
ENDOR Studies of the Hyperfine Interaction of Phenylgalvinoxyl Radicals in Solution
Authors: Mukai Kazuo , Kamata Takashi , Tamaki Toshiko , Ishizu Kazuhiko 
Published: July 2006

Abstract
The ENDOR spectra of ten kinds of phenylgalvinoxyl derivatives in solution have been observed, and the hyperfine splitting constants have been determined. The formally equivalent four meta ring protons of the galvinoxyl skeleton in the phenylgalvinoxyl radical become magnetically nonequivalent in two groups of two. This behavior may be explained by assuming that splittings arising through pure spin polarization, or through mixed hyperconjugation and spin polarization, are different for syn and anti meta ring protons of the phenylgalvinoxyl radical. A similar effect has been observed in the ENDOR spectra of other phenylgalvinoxyl derivatives. In radicals with a large substitution group at the meta or para position of the phenyl ring, the galvinoxyl skeleton twists unsymmetrically on either side; thus, all or three among the four meta ring protons become magnetically nonequivalent. The solvent dependence of the ENDOR spectra of the phenylgalvinoxyl radicals constituted strong evidence for the importance of the solvent in fixing the conformation and symmetric property of the radical molecules. The proposed analyses of the ENDOR spectra were also supported by the McLachlan Molecular Orbital calculations.
Equilibrium Spreading Pressure of the Mixed System of Normal Long Chain Fatty Acids
Authors: Fujii Kozo , Yoshino Seiji , Motomura Kinsi , Nakamura Makoto , Matuura Ryohei 
Published: July 2006

Abstract
Equilibrium spreading pressure were measured at various compositions and temperatures for mixed systems of tridecanoic acid-myristic acid, myristic acid-pentadecanoic acid, and pentadecanoic acid-palmitic acid, and thermodynamical treatment of these data with respect to the equilibrium between crystal and monolayer was performed. By evaluating the equilibrium composition of monolayer phase from the measured curve of equilibrium spreading pressure vs. composition of solid phase, the phase diagram was constructed. It was found that the equilibrium curve has a maximum point where the solid and monolayer phases have the same composition and a point where the solid phase is in equilibrium with two monolayer phases. The partial molar enthalpy change accompanied by the phase transition from solid to monolayer were found to be dependent on the composition.
Catalytic Isotope Exchange Reaction between Deuterium Gas and Water Pre-Adsorbed on Platinum/Alumina
Authors: Iida Itsuo , Kato Junko , Tamaru Kenzi 
Published: July 2006

Abstract
The catalytic isotope exchange reaction between deuterium gas and the water pre-adsorbed on Pt/Al2O3 was studied. At reaction temperatures above 273 K, the exchange rate was proportional to the deuterium pressure and independent of the amount of adsorbed water, which suggests that the rate determining step is the supply of deuterium from the gas phase. Its apparent activation energy was 38 kJ mol−1. Below freezing point of water, the kinetic behaviour was different from that above freezing point. At higher deuterium pressures the rate dropped abruptly at 273 K. Below the temperature the apparent activation energy was 54 kJ mol−1 and the exchange rate depended not on the deuterium pressure but on the amount of the pre-adsorbed water. At lower pressures, however, the kinetic behaviour was the same as that above 273 K, till the rate of the supply of deuterium from the gas phase exceeded the supply of hydrogen from adsorbed water to platinum surface.
These results suggest that below 273 K the supply of hydrogen is markedly retarded, the state of the adsorbed water differing from that above 273 K. It was also demonstrated that when the adsorbed water is in the state of capillary condensation, the exchange rate becomes very small.
Stereochemical Studies of Elimination Reactions of 2-Bromobutane and 2,3-Dibromobutane over Bivalent-Ion Exchanged Silica Gels
Authors: Aoki Yukio , Misono Makoto , Yoneda Yukio 
Published: July 2006

Abstract
Elimination reactions of 2-bromobutane and 2,3-dibromobutane over silica gels in which silanol protons on the surface were exchanged with bivalent ions such as Ba(II), Ca(II), Mg(II), and Ni(II) have been investigated. Dehydrobromination of 2-bromobutane was found to proceed mainly with syn elimination. Debromination by anti mode and non-stereospecific dehydrobromination were observed for 2,3-dibromobutane. The catalytic activities of these silica gels exhibit reversed volcano-type patterns when they are plotted against the electronegativity of metal ion together with those of alkali-ion exchanged silica gels. Reaction intermediates consistent with the stereochemistry observed are a s-butyl cation and a bromonium ion, respectively for 2-bromobutane and 2,3-dibromobutane.
Microwave Spectrum of (Chloromethyl)germane
Authors: Nakagawa Jun , Hayashi Michiro 
Published: July 2006

Abstract
In order to determine the molecular structure and barrier to internal rotation of the GeH3 group, the microwave spectra of (chloromethy)germane and its deuterated species ClCH2GeD3 have been investigated. From splittings of the spectra due to the first excited GeH3 torsional state, the barrier to internal rotation was determined to be 1740±30 cal/mol. Assuming the cylindrical symmetry of the C–Cl bond, the quadrupole coupling constant was determined to be χzz=−74.7 MHz for the 35ClCH274GeH3 species.
The Crystal and Molecular Structure of Naphthanthrone
Authors: Fujisawa Shoji , Oonishi Isao , Aoki Junji , Iwashima Satoshi 
Published: July 2006

Abstract
The crystals of naphthanthrone(C19H10O) are orthorhombic, with the P212121 space group and these lattice constants: a=17.345(17), b=3.973(13), c=17.392(14) Å, and Z=4. The structure was solved by the Patterson method and refined by a block-diagonal least-squares program to give an R-value of 0.085 on the basis of the 897 observed reflections collected by Weissenberg photographs. The molecule is planar within the limits of experimental error and has an approximate symmetry of mm. The molecules are stacked face-to-face by van der Waals forces along the b-axis. The interplanar spacing is 3.50 Å.
Theoretical Analysis of Optical Rotatory Power of Methylcyclohexanone with Treatment of Conformational Equilibria
Authors: Nakamura Tomoyasu , I’Haya Yasumasa J 
Published: July 2006

Abstract
Optical rotational strength for the n-π* transition of (R)-3-methylcyclohexanone is calculated by the CNDO/2 and INDO methods and compared with the observed values at 81 and 300 K, taking account of conformational equilibria. The conformer species are chosen so that they have minimal potential energies, the potential energy surface being estimated with a non-bonded interaction approximation. Excited state wave functions are improved by a model potential method. The ratio of the rotational strengths at 81 and 300 K, each of them being calculated as a statistical average of the rotational strengths of four conformers, is in good agreement with the corresponding observed value.
Carbon-13 and Proton Nuclear Magnetic Resonance Spectra of Methylmercury Nitrate in Strong Acids
Authors: Kawasaki Yoshikane , Aritomi Mitsutoshi , Iyoda Jun 
Published: July 2006

Abstract
Proton and carbon-13 nuclear magnetic resonance spectra and Raman spectra of some methylmercury compounds, CH3HgX, were measured. The spin-spin coupling constants, 2J(199Hg–H) and 1J(13C–H) of methylmercury nitrate in some strong acids were found to increase when the proton resonance of the methyl group attached to the mercury shifts to lower magnetic field. It was also found that the C–H stretching bands of the methyl group shift to higher frequency in the strong acids. The results are explained by an increase of the effective positive charge on the mercury. As has been observed in other alkylmercury compounds, the spin-spin coupling constant between directly bonded mercury and carbon nuclei, 1J(199Hg–C),of some methylmercury compounds in organic solvents increased with the geminal spin-spin coupling constant, 2J(199Hg–H). The 1J(199Hg–13C) value of methylmercury nitrate in strong acids was found to decrease, whereas the 2J(199Hg–H) values increased in these media. The lowering of the mercury-carbon bond strengths in the strong acids, which was revealed from the mercury-carbon stretching frequency in the Raman spectra, is considered one possible reason for the decrease of the 1J(199Hg–13C) value.
Template-Directed Synthesis of Oligonucleotide. Condensation of Nucleotide in the Presence of Polystyrene-Supported Neutral Oligonucleotide Derivative
Authors: Shimidzu Takeo , Imai Akio 
Published: July 2006

Abstract
A template-directed synthesis of oligonucleotide in the presence of polystyrene-supported neutral oligonucleotide derivative was studied. The oligonucleotide which has the sequence of the complementary base with the template, the neutral oligonucleotide derivative, yielded with a considerable amount, when the template with degree of oligomerization of 4 was used.
Complex Formation of Crosslinked Poly(4-vinylpyridine) Resins with Copper(II)
Authors: Nishide Hiroyuki , Deguchi Jichio , Tsuchida Eishun 
Published: July 2006

Abstract
Poly(4-vinylpyridine) was crosslinked with 1,4-dibromobutane, The obtained resin (DBQP) formed a stable complex with Cu2+, and the adsorption capacity of DBQP varied with the degree of crosslinking. The complex, formation of DBQP with Cu2+ was studied by examining the adsorption equilibrium and the spectroscopic measurement. The resin complex seems to be formed via no step-by-step mechanism, and the stability constant was appreciably large in comparison with those of non-crosslinked polymers and of a monomeric analogue. In the highfy crosslinked resins, the ligand-field is relatively weak and the stability of the Cu2+ complex is decreased.
Crystal Structures of Bis[N-(3-methoxysalicylidene)isopropylaminato]nickel(II) (Brown Room Temperature Phase) and -cobalt(II)
Authors: Ashida Tamaichi , Iwata Suteo , Yamane Takashi , Kakudo Masao , Takeuchi Akira , Yamada Shoichiro 
Published: July 2006

Abstract
The crystal structures of two Schiff base complexes, bis[N-(3-methoxysalicylidene)isopropylaminato]nickel (II) and -cobalt(II), have been determined. Ni complex: brown, room temperature phase, monoclinic, P21/c, a=21.089, b=7.254, c=14.386 Å, β=98.40°, Z=4, final R=0.076. Co complex: red, triclinic, P\bar1, a=22.699, b=7.395, c=14.099 Å, α=107.78, β=99.03, γ=93.75°, Z=4, final R=0.13. In both crystals the metal ions have distorted tetrahedral coordinations. The two crystals are roughly isostructural, although appreciable differences exist in both of the molecular and crystal structures. The Co complex gives a unique example of the methoxy group which sticks out nearly perpendicularly from the phenyl plane.
The Preparation and Characterization of Isomers of (Amino acidato)(iminodiacetato)nitrocobaltate(III)(1–) Complexes
Authors: Yamamoto Yukihiro , Kaizaki Sumio , Shimura Yoichi 
Published: July 2006

Abstract
Three geometrical isomers of fac(ida)-[Co(NO2)(gly)(ida)]− have been prepared and optically resolved (gly=glycinato(1–) and ida=iminodiacetato(2–) ligand), and their configurations were determined from the visible and ultraviolet absorption, and circular dichroism spectra. A diastereomeric pair was obtained for the corresponding l-alaninato, l-serinato, or l-prolinato complex.
Hydrothermal Synthesis of Some Varieties of Zircon
Authors: Nakai Izumi , Shima Tetsuo , Izawa Mihoko , Nagashima Kozo 
Published: July 2006

Abstract
Some varieties of zircon which contain yttrium, niobium, and phosphorus in solid solution have been synthesized at temperatures 500–550 °C and under pressures 700–1000 kg/cm2. In zircon containing yttrium, the unit cell constants a and c increase with increase in yttrium content up to 70 mol%. From IR and TGA studies, a valence compensation accompanying the substitution of yttrium is assumed to be effected by a concomitant substitution of OH for O sites, and the variety is represented by a formula (Zr,Y)Si(O,OH)4. On the other hand, the substitution of Nb5+ for Zr4+ is followed by a decrease in the cell constants. Zircon phase did not form from starting materials with more than 20 mol% of niobium content. From the syntheses of zircon containing both yttrium and niobium, the formula (Zr,Y,Nb) Si(O,OH)4 is found to be appropriate for naegite. An attempt was made to synthesize some solid solutions between zircon and xenotime. The unit cell constant c of the products is found to decrease with the substitution of PO4 for SiO4.
Syntheses of d-Arabinofuranosyl and 2′-Deoxy-d-ribofuranosyl Pyrazolecarboxamides
Authors: Makabe Osamu , Yajima Jutaro , Umezawa Sumio 
Published: July 2006

Abstract
Several d-arabino- and 2′-deoxy-d-ribonucleosides of carbamoylpyrazoles were synthesized by an acid-catalyzed fusion reaction of 1-O-acetyl derivatives of the corresponding sugars with pyrazole derivatives. Spectral evidences for their N-glycosylation sites and anomeric configurations were presented.
Synthesis of Corticotropin Peptides. X. The Synthesis of ACTH(1–18)–OH, ACTH(1–18)–NH2 and ACTH(1–19)–NH2
Authors: Inouye Ken , Shinozaki Fusako , Kanayama Makoto , Otsuka Hideo 
Published: July 2006

Abstract
The final coupling, deprotection and purification processes for the synthesis of octadecapeptides, H–Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val–Gly–Lys–Lys–Arg–Arg–OH(I) and H–Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val–Gly–Lys–Lys–Arg–Arg–NH2 (II), corresponding to the first eighteen amino acid residues of corticotropin (ACTH) are described, in which the N-hydroxysuccinimide ester of the N-terminal decapeptide derivative is coupled with the C-terminal octapeptide and octapeptide amide derivatives to give the two protected end products. The same decapeptide active ester is also utilized to the synthesis of a nonadecapeptide, H–Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val–Gly–Lys–Lys–Arg–Arg–Pro–NH2 (III), identical with the first nineteen amino acid residues of ACTH. The in vivo steroidogenic potencies of the synthetic peptides are compared with that of the synthetic human ACTH (αh-ACTH) as reference to show that the relative potencies of I, II, and III vs. αh-ACTH are 0.14, 0.48, and 0.47, respectively, as estimated on a molar basis.
Synthesis of Corticotropin Peptides. XIII. The Synthesis of a Hexacosapeptide and a Heptacosapeptide Corresponding to the First Twenty-six and Twenty-seven Amino Acid Residues of Corticotropin (ACTH)
Authors: Inouye Ken , Sumitomo Yoshie , Shin Masaru 
Published: July 2006

Abstract
The syntheses are described of a hexacosapeptide H–Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val–Gly–Lys–Lys–Arg–Arg–Pro–Val–Lys–Val–Tyr–Pro–Asn–Gly–OH (I) and a heptacosapeptide H–Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val–Gly–Lys–Lys–Arg–Arg–Pro–Val–Lys–Val–Tyr–Pro–Asn–Gly–Ala–OH (II) corresponding to the first twenty-six and twenty-seven amino acid residues, respectively, of corticotropin (ACTH), in which a new protecting group 1-methylcyclohexyloxycarbonyl (Mhoc) is utilized for the temporary protection of the ε-amino function of lysines. The in vivo steroidogenic potencies of the synthetic peptides I and II are compared on a molar basis with those of ACTH(1–18)-NH2 and synthetic human ACTH (αh-ACTH) to demonstrate that the relative potencies of I and II vs. ACTH(1–18)–NH2 are 2.3 and 2.3–3.8, respectively, and those vs. αh-ACTH are 1.1 and 1.1–1.8, respectively.
A Study of the 1,3,5-Trialkylbenzenes with Aluminum Chloride-Hydrogen Chloride Systems
Authors: Nambu Nobuyoshi , Hiraoka Nobumoto , Shigemura Kenji , Hamanaka Sawako , Ogawa Masaya 
Published: July 2006

Abstract
The “red-oil” complex layers of systems of 1,3,5-trialkylbenzenes (Me3B, Et3B, i-Pr3B, and s-Bu3B) with AlCl3–HCl were prepared and studied by means of 1H NMR and 13C NMR spectroscopy. The results show that the 2,4,6-trialkylbenzenium ion is evidently formed in the complex layer of the AlCl3–HCl system, much as in other super acid systems, and that those ions from i-Pr3B and s-Bu3B are substantially stable, even at room temperature. The molar ratios of i-Pr3B and s-Bu3B to HAl2Cl7 are almost 1. On the other hand, the molar ratios of Me3B and Et3B to HAl2Cl7 are 4.5 and 1.9 respectively. These two complex layers are considered to be formed by both 1,3,5-trialkylbenzene and its protonated product, and to be in a certain equilibrium state as a result of proton exchange at room temperature.
Coenzyme Models. VIII. Reduction of the Schiff Base of Pyridoxal Analogs by 1,4-Dihydronicotinamide
Authors: Shinkai Seiji , Shiraishi Sumihiro , Kunitake Toyoki 
Published: July 2006

Abstract
Reduction of Schiff bases by 1-benzyl-1,4-dihydronicotinamide (BzlNH) was performed in refluxing methanol. Protonated imines such as N-(p-nitrobenzylidene)benzylamme hydrochloride (1H+) and N-(4-nitrosalicylidene)benzylamine hydrochloride (1(OH)H+) were reduced to the corresponding aminomethyl derivatives. The NMR product analysis for the reaction of BzlNH and 1H+ in refluxing ethanol-d established that the solvent deuteron was not incorporated into the aminomethylene product. 1(OH), unprotonated species, was partially reducible, whereas 1 was totally unreactive. The facile reduction of 1 occurred in the presence of several amine hydrochlorides (NEt3·HCl, imidazole hydrochloride, N,N,N′,N′-tetramethylethylenediamine dihydrochloride). These results show that the ortho hydroxyl group of 1(OH) facilitates imine reduction not only by polarization of the Schiff base via hydrogen bonding but also by proton transfer. The relative reactivity of the Schiff base to the BzlNH reduction is: 1H+, 1+NEt3·HCl≥1(OH)H+&gt;1(OH)&gt;1(unreactive) This order is similar to that found in “trans-Schiffization” between semicarbazide and the Schiff base of pyridoxal and its analogs, as reported by Gordes and Jencks.
Synthesis of 1-N-[(S)-4-amino-2-hydroxybutyryl]-3′-deoxyribostamycin (3′-Deoxybutirosin B)
Authors: Ikeda Daishiro , Nagaki Fumiko , Tsuchiya Tsutomu , Umezawa Sumio , Umezawa Hamao 
Published: July 2006

Abstract
3′-Deoxybutirosin B (13) was prepared from ribostamycin by way of the following reaction sequences: 1) selective 3′-O-arylsulfonylation, 3′-iodination, and 3′-deoxygenation; 2) 1,6-cyclic carbamate formation,selective hydrolysis of the carbamate and acylation of the free 1-NH2 group with an active ester of (S)-4-amino-2-hydroxybutyric acid. The structure of 13 was confirmed by comparison of its Δ[M]TACu value with those of butirosin B and 4′-deoxybutirosin B.
Quantitative Analysis of Organocalcium Halides by Double Titration
Authors: Kawabata Nariyoshi , Nakamura Hisao , Yamashita Shinzo 
Published: July 2006

Abstract
The principle of Gilman’s double titration method for organolithium compounds was applied to the quantitative analysis of organocalcium halides. Chloroform was found to be useful as a reactive halide which completely decomposed organocalcium halides, but did not react with other alkali. The method gave satisfactory analysis for methyl-, propyl- and phenylcalcium iodides.
A Study of the Solubilization of Polar Oily Materials by Sodium Dodecyl Sulfate
Authors: Ogino Keizo , Abe Masahiko , Takesita Nobuo 
Published: July 2006

Abstract
The difference due to carbon-chain lengths and kinds of polar groups in the solubilizing phenomenon caused by Sodium Dodecyl Sulfate (SDS) of polar normal fatty acids and polar normal alcohols has been studied in terms of the amount of solubilization, the viscosity, and the surface tension. The amount of solubilization decreased with an increase in the number of carbon atoms in the molecules of oily materials, and it was larger for normal fatty acids than for normal higher alcohols with the same number of carbon atoms in the molecule. It was found that the oily materials of a greater amount of solubilization exhibited a small viscosity and a small rate of the reduction of surface tension.
Nuclear Spin-lattice Relaxation in Sn(CH3)4
Authors: Hasebe Tooru , Soda Gen , Chihara Hideaki 
Published: July 2006

Abstract
Nuclear magnetic relaxation T1 of solid Sn(CH3)4 increased monotonously with temperature between 77 and 217 K. The activation energy for intramolecular methyl reorientation was 2.6±0.3 kJ mol−1. From measurements on the liquid phase, the apparent activation energy associated with the relaxation process was 8.6 kJ mol−1. Differential thermal analyses revealed the existence of another unstable solid phase.
Electrical Conductivity Changes in α-FeOOH and β-FeOOH upon Surface Dehydration
Authors: Kaneko Katsumi , Inouye Katsuya 
Published: July 2006

Abstract
The electrical conductivity of α-FeOOH and β-FeOOH, preheated at 100–140 °C in vacuo, was determined over the temperature range from 0 to 140 °C. The conductivity increased considerably with a rise in the preheating temperature. The increase appears to be due to Fe2+ions produced by surface dehydration in the preheating.
Preparation of γ-FeOOH by Aerial Oxidation of Iron(II) Chloride Solution
Authors: Hamada Shuichi , Kuma Kenshi 
Published: July 2006

Abstract
Detailed conditions for preparing γ-FeOOH by aerial oxidation of iron(II) chloride solution were studied. The upper limit of temperature for obtaining only the γ-FeOOH decreased with increases in the pH value and the initial concentration of Fe(II) ions. The shapes of the prepared γ-FeOOH particles were examined in connection with the oxidizing conditions.
The Relationship between the Atmospheric Carbon Dioxide Concentration and the Carbon-14 Activity in Tokyo
Authors: Ikeda Sakuji , Shirakawa Hideki , Hattori Iwakazu 
Published: July 2006

Abstract
Measurements of the atmospheric CO2 concentration and the 14C activity in Tokyo were carried out. The activity of 14C in the CO2 decreased with an increase in the atmospheric CO2 concentration, indicating that increases in the atmospheric CO2 are caused only by the burning of fossil fuels.
On the Mechanism of Uncatalyzed Reduction of Triphenylmethyl Chloride with Triethylgermane
Authors: Sakurai Hideki , Mochida Kunio 
Published: July 2006

Abstract
Reduction of triphenylmethyl chloride with triethylgermane in benzene proceeds by a free-radical mechanism as evidenced by the observation of an ESR spectrum of the triphenylmethyl radical. However, the reduction involves apparently an ionic mechanism in a polar solvent such as dichloromethane and nitromethane.
Reaction of Tetramethylurea with Photoexcited Carbonyl Compounds
Authors: Tsujimoto Yuji , Nakahara Akihiro , Nishimura Yoshiyuki , Miyamoto Takuji , Odaira Yoshinobu 
Published: July 2006

Abstract
The photoreaction of tetramethylurea (I) with some carbonyl compounds (II) afforded in good yields the respective urea derivatives (III), which were converted into 2-oxazolidinones (IV).
Substituent Effects on Photochemical Extrusion of Phosphorus Group from 3-Phospholene System
Authors: Tomioka Hideo , Nakamura Shigehiro , Ohi Tsutomu , Izawa Yasuji 
Published: July 2006

Abstract
The rate of photo-extrusion of phenylphosphinidene oxide from 1-phenyl-3-phospholene 1-oxide was enhanced by β-methylation. It was found that the photoextrusion can be extended to the generation of phenylphosphinidene, but attempts to generate other phosphorus intermediates i.e., metaphosphite and methylphosphinidene oxide, were unsuccessful.
Synthesis of Dibenzo[d,j]-6,8-bisdehydro-oxa-[13]annulene
Authors: Ojima J\={u}ro , Kimura Akihiko , Ikeguchi Masahiko 
Published: July 2006

Abstract
The title compound (VII or VIII) has been synthesized from o-ethynylbenzaldehyde (II) by the Wittig reaction with the salt (III) followed by the oxidative coupling. The examination of the NMR spectra suggests that both of VII and VIII are atropic molecules.
The Reaction of Benzofuran with Manganic Acetate
Authors: Kasahara Akira , Izumi Taeko , Suzuki Akio , Takeda Toru 
Published: July 2006

Abstract
The oxidation of benzofuran with manganic acetate in a mixture of acetic acid and acetic anhydride yielded four products: 2-(acetoxymethyl)benzofuran, 3a,8b-dihydrofuro[3,2-b] benzofuran-2(3H)-one, bis(2-benzofuranyl)methane, and 2-benzofuranylacetic acid.