bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acid‐Mediated Highly Regioselective Oxidation of Substituted Furans: A Simple and Direct Entry to Substituted Butenolides.
Authors: Cenal Juan P. , Carreras Carlos R. , Tonn Carlos E. , Padron Juan I. , Ramirez Miguel A. , Diaz David D. , Garcia‐Tellado Fernando , Martin Victor S. 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Regiospecific Synthesis, Structure and Electron Ionization Mass Spectra of 1,3‐Thiazolidin‐4‐ones Containing the Acridine Skeleton.
Authors: Geci Imrich , Valtamo Pauliina , Imrich Jan , Kivelae Henri , Kristian Pavol , Pihlaja Kalevi 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of 2H‐Chromeno[4,3‐b]pyridine‐2,5(1H)‐diones and Related Heterocycles via the Erlenmeyer—Ploechl Reaction.
Authors: Ivanov Ivo Christov , Glasnov Toma Nikolaev , Heber Dieter 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Studies with Quinolines: New Synthetic Routes to 4H,5H,6H,9H‐Benzo[ij]pyrano[2,3‐b]quinolizine‐8‐one (III), 4H‐Pyrano[2,3‐b]pyridine (V), 2H‐Pyran‐2‐one (IX) and Pyranopyridoquinoline (XI) Derivatives
Authors: El‐Taweel Fathy Mohamad Abdel Aziz 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Enantioselective Friedel—Crafts Type Addition of indoles to Nitro‐Olefins Using a Chiral Hydrogen‐Bonding Catalyst — Synthesis of Optically Active Tetrahydro‐β‐Carbolines.
Authors: Zhuang Wei , Hazell Rita G. , Joergensen Karl Anker 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Convenient Synthesis of Substituted 5‐(Hydroxymethyl)‐8‐methyl‐3‐(4‐phenylquinazolin‐2‐yl)‐2H‐pyrano [2,3‐c]pyridin‐2‐ones.
Authors: Zhuravel Irina O. , Kovalenko Sergiy M. , Ivachtchenko Alexandre V. , Chernykh Valentin P. , Shinkarenko Pavlo E. 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Properties of Pyrimido[4,5‐a]‐ and Pyrido[4,3‐a]carbazole Derivatives.
Authors: Kukushkin S. Yu. , Ivanov P. Yu. , Alekseeva L. M. , Kobrakov K. I. , Granik V. G. 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
A New Method for the Generation of α‐Nitrosoolefins from Ketooximes and Its Application to the Synthesis of 5,6‐Dihydro‐4H‐1,2‐oxazine Derivatives.
Authors: Gaonkar S. L. , Rai K. M. Lokanatha 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Antimicrobial Activity of 3‐(N‐Arylamino)‐2‐phenylnaphtho[1,3‐d]‐1,2‐oxaphosphole 2‐Oxides.
Authors: Haranath P. , Anasuyamma U. , Raju C. Naga , Reddy C. Devendranath , Reddy C. Suresh 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Vinyltriphenylphosphonium Salt Mediated Efficient Synthesis of Iminophosphoranes Derived from 2‐Aminothiazoles.
Authors: Adib Mehdi , Mostofi Manizheh , Ghanbary Khadijeh , Bijanzadeh Hamid Reza 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Palladium‐Catalyzed Intramolecular Selenocarbamoylation of Alkynes with Carbamoselenoates: Formation of α‐Alkylidene‐β‐lactam Framework.
Authors: Toyofuku Masashi , Fujiwara Shin‐ich , Shin‐ike Tsutomu , Kuniyasu Hitoshi , Kambe Nobuaki 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of N‐Protected β‐Aminocyclopropanedicarboxylates and Their Ring Transformation to N‐Benzhydryl‐3‐alkoxycarbonyl‐4,4‐dialkylpyrrolidin‐2‐ones.
Authors: Mangelinckx Sven , De Kimpe Norbert 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Mono‐ and Polyhydroxylated Cyclobutane Nucleoside Analogues.
Authors: Marsac Yoann , Nourry Arnaud , Legoupy Stephanie , Pipelier Muriel , Dubreuil Didier , Aubertin Anne‐Marie , Bourgougnon Nathalie , Benhida Rachid , Huet Francois 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Citridones, New Potentiators of Antifungal Miconazole Activity, Produced by Penicillium sp. FKI‐1938. Part 1. Taxonomy, Fermentation, Isolation and Biological Properties.
Authors: Fukuda Takashi , Yamaguchi Yuichi , Masuma Rokuro , Tomoda Hiroshi , Omura Satoshi 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Comparison of the Magnetic and Optical Properties of Wide‐Gap (II,Mn)VI Nanostructures Confined in Mesoporous Silica
Authors: Brieler Felix J. , Grundmann Petra , Froeba Michael , Chen Limei , Klar Peter J. , Heimbrodt Wolfram , Krug von Nidda Hans‐Albrecht , Kurz Thomas , Loidl Alois 
Published: October 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Twelve‐year mortality results of a randomized trial of 2 versus 5 years of adjuvant tamoxifen for postmenopausal early‐stage breast carcinoma patients (SITAM 01)
Authors: Belfiglio Maurizio , Valentini Miriam , Pellegrini Fabio , De Berardis Giorgia , Franciosi Monica , Rossi Maria C.E. , Sacco Michele , Nicolucci Antonio 
Published: October 2005

AbstractBACKGROUNDThis study evaluated the impact on overall survival (OS) of 2 versus 5 years adjuvant tamoxifen in early breast carcinoma patients after 12 years of follow‐up.METHODSWomen with breast carcinoma T1–3, N0–3, M0, aged 50–70 years, were eligible for this multicenter randomized Phase III trial. Patients event‐free after 2 years of tamoxifen therapy (TAM) were randomly assigned to stop or continue TAM (20 mg/day) for an additional 3 years. The primary endpoint was disease‐free survival. Secondary endpoints included OS and toxicity.RESULTSFrom 1989 through 1996, 1901 patients were randomly assigned either to stop treatment (n= 958) or to continue TAM (n= 943). Overall, 98% of patients alive at the previous report (n= 1611) had updated information about OS, of whom 549 had died. The median duration of postrandomization follow‐up was 115 months (interquartile range, 86–137). No statistically significant differences between the two arms were detected in the whole population (hazard ratio [HR], 1.02; 95% confidence interval [CI], 0.86–1.22) and in estrogen receptor (ER)‐positive patients (HR, 0.90; 95% CI, 0.72–1.13). In the latter group, survival curves started to diverge after 90 months, showing a trend in favor of the 5‐year arm. In younger (age ≤55 yrs) ER‐positive patients longer TAM was associated with a 44% decrease in the risk of death (HR, 0.56; 95% CI, 0.31–1.00), while no clear benefit was documented in women older than 55 years of age (HR, 0.98; 95% CI, 0.77–1.25).CONCLUSIONSThe benefits of longer TAM on OS start to emerge only after 9 years from diagnosis and seem to be more relevant in younger ER‐positive women. Cancer 2005. © 2005 American Cancer Society.
Notable effects of angiotensin II receptor blocker, valsartan, on acute cardiotoxic changes after standard chemotherapy with cyclophosphamide, doxorubicin, vincristine, and prednisolone
Authors: Nakamae Hirohisa , Tsumura Kei , Terada Yoshiki , Nakane Takahiko , Nakamae Mika , Ohta Kensuke , Yamane Takahisa , Hino Masayuki 
Published: October 2005

AbstractBACKGROUNDThere are three distinct types of doxorubicin‐induced cardiotoxicity (acute, chronic, and late‐onset). Although previous studies with animal models suggest that angiotensin II plays a key role in the process of the doxorubicin‐induced cardiotoxicity, there has been no such observation in humans. This randomized study investigated whether valsartan, a new class of angiotensin II receptor blocker (ARB), can inhibit acute cardiotoxicity after doxorubicin‐based chemotherapy.METHODSForty consecutive patients with untreated non‐Hodgkin lymphoma who were scheduled to undergo standard chemotherapy with cyclophosphamide, doxorubicin, vincristine, and prednisolone (CHOP) (mean age, 56 yrs; range, 24–70 yrs) were randomized with minimization methods to receive CHOP with or without 80 mg/day of valsartan. Acute cardiotoxicity was comprehensively evaluated with neurohumoral, echocardiographic, and electrocardiographic markers before and on Days 3, 5, and 7 after the initiation of CHOP.RESULTSCHOP induced transient increases in the left ventricular end‐diastolic diameter in an echocardiogram, the QTc interval and QTc dispersion in an electrocardiogram, and in the plasma brain and atrial natriuretic peptides. All these changes returned to nearly normal levels within a week after CHOP (P < 0.001). Notably, valsartan significantly prevented all these changes except for the elevation in atrial natriuretic peptide (P < 0.05). No significant change was observed in blood pressure or heart rate between the valsartan and control groups.CONCLUSIONSThe results indicate that angiotensin II may play an essential role in acute CHOP‐induced cardiotoxicity in humans. Future long‐term studies are necessary to judge whether ARBs have a potential to prevent the chronic or late‐onset types of doxorubicin‐induced cardiotoxicity. Cancer 2005. © 2005 American Cancer Society.
Cognitive functioning after adjuvant chemotherapy and/or radiotherapy for early‐stage breast carcinoma
Authors: Donovan Kristine A. , Small Brent J. , Andrykowski Michael A. , Schmitt Frederick A. , Munster Pamela , Jacobsen Paul B. 
Published: October 2005

AbstractBACKGROUNDEvidence suggests that women diagnosed with early‐stage breast carcinoma may experience cognitive problems as a consequence of adjuvant chemotherapy treatment. The present study was conducted to examine whether there are differences in cognitive performance and cognitive complaints between women treated with and without chemotherapy for TNM Stage 0 to II breast carcinoma.METHODSAs part of a larger study on quality of life, women were recruited with newly diagnosed Stage 0 to II breast carcinoma scheduled to be treated with chemotherapy plus radiotherapy (n = 60) or radiotherapy only (n = 83). Six months after the completion of treatment, participants were administered a standard neuropsychologic battery to assess cognitive performance and a self‐report measure to assess perceived cognitive problems.RESULTSThere were no statistically significant differences between women who received chemotherapy and those who did not with regard to their average performance on tests of episodic memory, attention, complex cognition, motor performance, or language. Likewise, there were no significant differences between the treatment groups in the prevalence of impairment in each of these cognitive domains. Women who underwent chemotherapy also did not report significantly more problems with cognitive functioning than women treated without chemotherapy.CONCLUSIONSThe findings failed to confirm previous reports suggesting adjuvant chemotherapy is associated with problems in cognitive functioning among women who receive treatment for Stage 0 to II breast carcinoma. Future research should use prospective longitudinal research designs incorporating appropriate comparison groups to further explore this issue. Cancer 2005. © 2005 American Cancer Society.
Transparent access to Grid resources for user software
Authors: Klous Sander , Frey Jaime , Son Se‐Chang , Thain Douglas , Roy Alain , Livny Miron , van den Brand Jo 
Published: October 2005

AbstractGrid computing promises access to large amounts of computing power, but so far adoption of Grid computing has been limited to highly specialized experts for three reasons. First, users are used to batch systems, and interfaces to Grid software are often complex and different to those in batch systems. Second, users are used to having transparent file access, which Grid software does not conveniently provide. Third, efforts to achieve wide‐spread coordination of computers while solving the first two problems is hampered when clusters are on private networks. Here we bring together a variety of software that allows users to almost transparently use Grid resources as if they were local resources while providing transparent access to files, even when private networks intervene. As a motivating example, the BaBar Monte Carlo production system is deployed on a truly distributed environment, the European DataGrid, without any modification to the application itself. Copyright © 2005 John Wiley & Sons, Ltd.
Large area lateral overgrowth of mismatched InGaP on GaAs(111)B substrates
Authors: Uematsu S. , Nomoto M. , Nakayama S. , Takahashi N. S. 
Published: October 2005

AbstractApplication of InGaAs/InGaP double‐heterostructure (DH) lasers increases the band offset between the cladding layer and the active layer more than the use of conventional 1.3 µm InGaAsP/InP lasers. As a first step in realizing 1.3 µm InGaP/InGaAs/InGaP DH lasers, we proposed InGaP lattice‐mismatched epitaxial lateral overgrowth (ELO) technique and successfully carried out the InGaP growth on both GaAs (100), (111)B and InP (100) substrates by liquid phase epitaxy. In this work, we grew the InGaP crystal on GaAs (111)B substrate by adjusting Ga and P composition in In solution, to obtain In0.79Ga0.21P (λ = 820 nm) virtual substrate for 1.3 µm InGaAs/InGaP DH lasers. To grow the InGaP all over the lateral surface of the substrate, the growth time was extended to 6 hours. The amount of InGaP lateral growth up to 2 hours was gradually increased, but the lateral growth was saturated. The InGaP lateral width was about 250 µm at the growth time of 6 hours. We report the result that optical microscope observation, CL and X‐ray rocking curve measurements and reciprocal lattice space mapping were carried out to evaluate the crystal quality of the grown InGaP layers. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Effect of annealing temperature on the structural and optical properties of amorphous Sb2Te2Se thin films
Authors: El‐Sayad E. A. , Sakr G. B. 
Published: October 2005

AbstractThin films of Sb2Te2Se were prepared by conventional thermal evaporation of the presynthesized material on Corning glass substrates. The chemical composition of the samples was determined by means of energy‐dispersive X‐ray spectrometry. X‐ray diffraction studies on the as‐deposited and annealed films revealed an amorphous‐to‐crystalline phase transition. The as‐deposited and annealed films at T a = 323 and 373 K are amorphous, while those annealed at T a= 423 and 473 K are crystalline with a single‐phase of a rhombohedral crystalline structure as that of the source material. The unit‐cell lattice parameters were determined and compared with the reported data. The optical constants (n , k ) of the investigated films were determined from the transmittance and reflectance data at normal incidence in the spectral range 400–2500 nm. The analysis of the absorption spectra revealed non‐direct energy gaps, characterizing the amorphous films, while the crystalline films exhibited direct energy gaps. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Thermal and infrared studies of calcium malate crystals grown in diffusion limited medium
Authors: Jini T. , Saban K. V. , Varghese G. 
Published: October 2005

AbstractSingle crystals of the title compound Ca (C4H5O5)2.10H2O are grown in silica gel using controlled chemical reaction method. Multifaceted single crystals of size up to 8 × 4 × 2 mm3 are obtained. Powder X‐ray Diffraction (XRD) pattern of the grown crystal and the Fourier Transform Infra‐Red (FTIR) spectrum in the range 400–4000 cm–1 are recorded. The vibrational bands corresponding to different functional groups are assigned. Thermal decomposition stages observed in the Thermo‐gravimetric (TG) and Differential Thermal Analysis (DTA) studies are discussed. A six‐stage thermal decomposition scheme is proposed for the compound. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Gli3 null mice display glandular overgrowth of the developing stomach
Authors: Kim Jae H. , Huang Zhen , Mo Rong 
Published: October 2005

AbstractThe role of the Hedgehog signaling pathway in various aspects of gut development is still poorly understood. In the developing stomach, Sonic (Shh) and Indian (Ihh) hedgehog are expressed in both distinct and overlapping regions. Loss of Sonic hedgehog function in the stomach results in a glandular phenotype of intestinal transformation and overgrowth. These changes are reminiscent of the pre‐malignant lesion, intestinal metaplasia. To determine the role of Hedgehog‐related transcription factors, Gli2 and Gli3, in Shh signaling during stomach development, we conducted a mutant analysis of glandular stomach from Shh, Gli2, and Gli3 mutant mice. Although Gli2 principally mediates the activator function of Shh, surprisingly we observed minimal changes in glandular development in the Gli2 mutant stomach. Furthermore, Gli3, which typically functions as a repressor of Hedgehog signal, showed a striking phenocopy of the glandular expansion and intestinal transformation found in Shh mutant stomach. A reduction in apoptotic events was seen in all mutant stomachs with no appreciable changes in proliferation. Both Shh and Gli3 mutant stomachs displayed early changes of intestinal transformation but these did not impact on the overall differentiation of the gastric epithelium. Interestingly, the observation that Gli3 shares a similar glandular phenotype to Shh mutant stomach reveals a possible novel role of Gli3 activator in the developing stomach. The embryonic stomach is a unique model of the Hedgehog pathway function and one that may help to uncover some of the mechanisms underlying the development of intestinal metaplasia. Developmental Dynamics 234:984–991, 2005. © 2005 Wiley‐Liss, Inc.
Synthesis, Characterization, and Catalytic Properties of SiPW‐X Mesoporous Silica with Heteropolyacid Encapsulated into Their Framework
Authors: Shi Chunfeng , Wang Runwei , Zhu Guangshan , Qiu Shilun , Long Jun 
Published: October 2005

AbstractA series of SiPW‐X mesoporous silica with Keggin‐type heteropolyacids (HPAs) encapsulated into their framework have been synthesized under strong acidic conditions. During hydrolysis of tetraethyl orthosilicate (TEOS), Na2HPO4 (P source) and Na2WO4 (W Source) are added into the initial sol‐gel system to form Keggin type HPAs. The final products have been intensively characterized by various techniques, such as XRD, TEM, N2 adsorption isotherm analysis, and by IR, UV/Visible, and 31P Magic Angle Spinning (MAS) NMR spectroscopy. Characterization results suggest that samples with an HPA weight percent of 13.3–20.7 % show very ordered hexagonal mesostructures. In addition, HPAs incorporated in the mesosilica are insoluble during catalysis. Results of catalytic tests show that SiPW‐X materials have catalytic activities that are comparable to bulk HPA in catalytic tests implementing chemical reactions of both small (cumene cracking and esterification of ethanol with acetic acid) and bulky (1,3,5‐triisopropylbenzene cracking and esterification of benzoic acid with tert‐butyl alcohol) molecules. It can be readily separated from the reaction system for reuse, which suggests the potential industrial application. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
The Synthesis and Characterisation of Bis(phosphane)‐Linked (6‐p‐Cymene)ruthenium(II)–Borane Compounds
Authors: Chaplin Adrian B. , Scopelliti Rosario , Dyson Paul J. 
Published: October 2005

AbstractThe reaction of [(η6‐p‐cymene)RuCl2]2 with some bis(phosphane) ligands (dppm, dppe, dppv, dppa, dpp14b, dppf) has been investigated. In general mixtures of products were obtained, although the pendant phosphane complexes [(η6‐p‐cymene)RuCl2(η1‐dppv)] and [(η6‐p‐cymene)RuCl2(η1‐dppa)] were isolated and characterized in the solid state by X‐ray diffraction. The later complex was obtained in lower yield and undergoes an equilibration reaction resulting in the formation of a dimeric species, where the dppa bridges two ruthenium centres, and uncoordinated phosphane; the bridging species was also structurally characterised in the solid state. In contrast, the reaction of [(η6‐p‐cymene)RuCl2(PPh3)] with dppa in the presence of [NH4]PF6 results in the formation of [(η6‐p‐cymene)RuCl(PPh3)(η1‐dppa)]PF6, which is stable in solution. A series of linked ruthenium–borane complexes, viz. [(η6‐p‐cymene)RuCl2(η1‐phosphane‐BH3)] (phosphane = dppm, dppe, dppv, dppa, dpp14b, dppf) and [(η6‐p‐cymene)RuCl(PPh3)(η1‐dppa‐BH3)]PF6 have been prepared from isolated pendant phosphane complexes, those generated in situ, or from a preformed phosphane–borane adduct. The solid‐state structures of [(η6‐p‐cymene)RuCl2(η1‐dppm‐BH3)], [(η6‐p‐cymene)RuCl2(η1‐dppe‐BH3)] and [(η6‐p‐cymene)RuCl2(η1‐dppv‐BH3)] have been determined by X‐ray diffraction analysis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
A Structural and Magnetic Investigation of Ferromagnetically Coupled Copper(II) Isophthalates
Authors: Shen Wei‐Zheng , Chen Xiao‐Yan , Cheng Peng , Yan Shi‐Ping , Zhai Bin , Liao Dai‐Zheng , Jiang Zong‐Hui 
Published: October 2005

AbstractPage 2304 of ref.1: In Table 2. Data collection and processing parameters, the c cell value for complex 2 should be 15.190(10) and not 16.2328(6) Å. The authors apologise for this mistake and thank Ms Lorna Rouse of the CCDC centre for bringing this to their attention.
Homo‐ and Heteroduplex Complexes Containing Terpyridine‐Type Ligands and Zn2+ (Eur. J. Inorg. Chem. 21/2005)
Authors: Dumitru Florina , Petit Eddy , van der Lee Arie , Barboiu Mihail 
Published: October 2005

AbstractThe cover picture shows the self‐assembly of two selected terpy‐type ligands by π‐π stacking around the Zn2+ ion to form isolated “heterodimers” (top left with terpy and a bis‐Schiff‐base ligand), 2D layers (bottom right with a hydrazone bis‐pyridine ligand and a bis‐Schiff‐base ligand) and a double helix (on the diagonal, with only bis‐Schiff‐base ligands). In addition a 1D stacked layer could be synthesized. Further details may be found in the article by M. Barboiu et al. on p. 4255 ff.
Enantio‐ and Diastereoselective Construction of α,α‐Disubstituted α‐Amino Acids for the Synthesis of Biologically Active Compounds
Authors: Ohfune Yasufumi , Shinada Tetsuro 
Published: October 2005

AbstractNatural and unnatural compounds possessing an α,α‐disubstituted α‐amino acid substructure have received significant attention because of their structural complexity and potent biological activity. Many methods have been developed for the enantio‐ and diastereoselective synthesis of α,α‐disubstituted α‐amino acids, many of which are focused on the total synthesis of natural products and related bioactive compounds. This microreview highlights recent advances in synthetic methods utilized for the synthesis of (1) α‐substituted serine analogs, which were extensively transformed into glutamate and enkephalin analogs, and (2) natural products such as lactacystin, manzacidins, kaitocephalin, altemicidin, sphingofungins, and neooxazolomycin. The key methods for the construction of these higher‐order structures are the asymmetric Strecker synthesis and enolate‐Claisen rearrangements used by our group, and aldol condensation of an enolate or bislactim, mercurio‐ or iodo‐cyclization, alkylation of an oxazoline, rearrangement of a trichloroacetimidate, nitrene insertion into a C–H bond, carbene insertion into a C–N bond, a Diels–Alder reaction, Lewis acid‐induced epoxide opening, and other methods by other groups. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Facile and Highly Diastereoselective Formation of a Novel Pentacyclic Scaffold by Direct Anodic Oxidation of 2,4‐Dimethylphenol
Authors: Malkowsky Itamar M. , Rommel Christina E. , Wedeking Katrin , Fröhlich Roland , Bergander Klaus , Nieger Martin , Quaiser Claudia , Griesbach Ulrich , Pütter Hermann , Waldvogel Siegfried R. 
Published: October 2005

AbstractElectrochemical oxidation of 2,4‐dimethylphenol directly provides pentacyclic systems being generated by an oxidative trimerization. The major pentacyclic scaffold is exclusively formed as a single diastereoisomer and is easily isolated. Three further pentacyclic compounds which occur in minor quantities were also fully characterized including their solid‐state structures. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)