bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis, Isomerization, and Antimicrobial Evaluation of Some Pyrazolopyranotriazolopyrimidine Derivatives.
Authors: Shamroukh Ahmed H. , Zaki Magdi E. A. , Morsy Eman M. H. , Abdel‐Motti Faiza M. , Abdel‐Megeid Farouk M. E. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Mild Method for Ullmann Reaction of 2‐Chlorobenzoic Acids and Aminothiazoles or Aminobenzothiazoles under Ultrasonic Irradiation.
Authors: Pellon Rolando F. , Docampo Maite L. , Fascio Mirta L. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Catalytic Oxidative Cyclocondensation of o‐Aminophenols to 2‐Amino‐3H‐phenoxazin‐3‐ones.
Authors: Giurg Miroslaw , Piekielska Katarzyna , Gebala Magdalena , Ditkowski Bartosz , Wolanski Marcin , Peczynska‐Czoch Wanda , Mlochowski Jacek 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of 2,2′‐Bi‐2H‐3,3′‐diaryl‐1,4‐benzothiazines from α,α‐Dibromoacetophenones and o‐Aminothiophenol.
Authors: Prakash Om , Sharma Nisha , Pannu Kamaljeet 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Fused Nonaromatic Heterocyclic Systems Based on Dioxolanones (I) and Hydrazine.
Authors: Chudinov Yu. B. , Gashev S. B. , Semenov V. V. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Large Ring Macrocycles (12‐18) by Recyclable Palladium‐Complexed Dendrimers on Silica Gel Catalyzed Intramolecular Cyclocarbonylation Reactions.
Authors: Lu Shui‐Ming , Alper Howard 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Palladium‐Catalyzed Borylation of Aryl Chlorides: Scope, Applications, and Computational Studies.
Authors: Billingsley Kelvin L. , Barder Timothy E. , Buchwald Stephen L. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Syntheses and Antimicrobial Activity of Some Novel 6‐Substituted Dibenzo[d,f][1,3,2]dioxaphophepin‐6‐oxides, Sulfides, and Selenides.
Authors: Haranath P. , Kumar V. Sreedhar , Reddy C. Suresh , Raju C. Naga , Reddy C. Devendranath 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Novel Stereodefined Vinylgermanes Bearing an Ally Group or an Allenyl Group: (E)‐2‐Aryl‐1‐germylalka‐1,4‐dienes and (E)‐4‐Aryl‐5‐germylpenta‐1,2,4‐trienes.
Authors: Kato Kotaro , Senda Yoshiya , Makihara Yoshiaki , Kojima Takeshi , Kurihara Hiroyuki , Takahashi Yutaka , Nakano Taichi 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Stable Germylenes, Stannylenes, and Related Compounds. Part 7. Synthesis and Structures of Compounds Hal—Sn—OCH2CH2NMe2 (Hal = Cl or F).
Authors: Khrustalev V. N. , Zemlyansky N. N. , Borisova I. V. , Kuznetsova M. G. , Krut'ko E. B. , Antipin M. Yu. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Three New 15,16‐Seco‐cycloartane Glycosides from Cimicifuga Rhizome.
Authors: Yoshimitsu Hitoshi , Nishida Makiko , Nohara Toshihiro 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Dammarane Triterpenes from Maytenus macrocarpa.
Authors: Torpocco Virginia , Chavez Haydee , Estevez‐Braun Ana , Ravelo Angel Gutierrez 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Modification of C2,3,23,28 Functional Groups on Asiatic Acid and Evaluation of Hepatoprotective Effects.
Authors: Jeong Byeong‐Seon , Kim Young Choong , Lee Eung‐Seok 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Total Synthesis of Valeriananoids A, B, and C via Autocatalytic Diastereoselective Domino Michael Reaction.
Authors: Fukushima Masakazu , Morii Akihiro , Hoshi Takashi , Suzuki Toshio , Hagiwara Hisahiro 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Design and Synthesis of a New, Conformationally Constrained, Macrocyclic Small‐Molecule Inhibitor of STAT3 via “Click Chemistry”.
Authors: Chen Jianyong , Nikolovska‐Coleska Zaneta , Yang Chao‐Yie , Gomez Cindy , Gao Wei , Krajewski Krzysztof , Jiang Sheng , Roller Peter , Wang Shaomeng 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Peptide Synthesis with 5‐Amino‐1‐methyl‐1H‐[1,2,4]triazole‐3‐carboxylic Acid.
Authors: Masiukiewicz Elzbieta , Rzeszotarska Barbara , Wawrzycka‐Gorczyca Irena , Kolodziejczyk Edyta 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Tandem Exploitation of Helix pomatia Glycosyltransferases: Facile Syntheses of H‐Antigen‐Bearing Oligosaccharides.
Authors: Bretting Hagen , Buck Friedrich , Jacobs Guenter , Meinke Sebastian , Scheppokat Angela M. , Thiem Joachim 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Pyrrolo‐isoquinolines Related to the Lamellarins Using Silver‐Catalyzed Cycloisomerization/Dipolar Cycloaddition.
Authors: Su Shun , Porco John A. Jr. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of the 3‐(3,4,5‐Trimethoxyphenyl)pyrrolidine (V): A New Conformationally Constrained Mescaline Analogue.
Authors: de L. Barreto Ricardo , Nascimbem Laura B. L. R. , Correira Carlos R. D. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Rhusemialins A—C, New Cyclolignan Esters from the Roots of Rhus javanica var. roxburghiana.
Authors: Ouyang Ming‐An , Wein Yung‐Shung , Su Ren‐Kuan , Kuo Yueh‐Hsiung 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Efficient and Practical Total Synthesis of Aigialomycin D.
Authors: Vu Nguyen Quang , Chai Christina L. L. , Lim Kok Peng , Chia Sze Chen , Chen Anqi 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cytotoxic Polyketides from the Marine Sponge Discodermia calyx
Authors: Shinde Pramod B. , Mansoor Tayyab A. , Luo Xuan , Hong Jongki , Lee Chong‐O. , Jung Jee H. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Role of Cationic Gold in Supported CO Oxidation Catalysts
Authors: Fierro‐Gonzalez Juan C. , Guzman Javier , Gates Bruce C. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Mesoporous Silica Supports for Improved Thermal Stability in Supported Au Catalysts
Authors: Gabaldon John P. , Bore Mangesh , Datye Abhya K. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Pentafluorophenyl Copper: Aggregation and Complexation Phenomena, Photoluminescence Properties, and Applications as Reagent in Organometallic Synthesis
Authors: Jaekle Frieder 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Recent Developments on the Chemistry of Aliphatic Nitro Compounds under Aqueous Medium
Authors: Ballini Roberto , Barboni Luciano , Fringuelli Francesco , Palmieri Alessandro , Pizzo Ferdinando , Vaccaro Luigi 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Solvent‐Free Photosynthesis of Cyclobutanes: Photodimerization of Crystalline Olefins
Authors: Natarajan Arunkumar , Ramamurthy V. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Non‐Conventional Glycosidic Linkages: Syntheses and Structures of Thiooligosaccharides and Carbohydrates with Three‐Bond Glycosidic Connections
Authors: Szilagyi Laszlo , Varela Oscar 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Soluble Protein Oligomers as Emerging Toxins in Alzheimer′s and Other Amyloid Diseases
Authors: Ferreira Sergio T. , Vieira Marcelo N. N. , De Felice Fernanda G. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Combinatorial Chemistry Underpinning Drug Discovery and Development
Authors: Bernardes Lilian Sibelle Campos , Silva Carlos H. T. P. , Taft Carlton A. , Carvalho Ivone 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
When Single‐Site Polymerization Catalysis Meets Chirality: Optical Activity of Stereoregular Polyolefins.
Authors: Carpentier Jean‐Francois 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Aminoisoxazoles: Preparations and Utility in the Synthesis of Condensed Systems
Authors: Kislyi V. P. , Danilova E. B. , Semenov V. V. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cationic Rhodium(I)/BINAP‐Type Bisphosphine Complexes: Versatile New Catalysts for Highly Chemo‐, Regio‐, and Enantioselective [2 + 2 + 2] Cycloadditions
Authors: Tanaka Ken 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chemical Constituents of Plants from the Genus Cerbera
Authors: Shen Li‐Ru , Jin Shu‐Min , Yin Bao‐Wei , Du Xiu‐Fang , Wang Yong‐Li , Huo Chang‐Hong 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Microcins, Gene‐Encoded Antibacterial Peptides from Enterobacteria
Authors: Duquesne Sophie , Destoumieux‐Garzon Delphine , Peduzzi Jean , Rebuffat Sylvie 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ptaquiloside, the Major Toxin of Bracken, and Related Terpene Glycosides: Chemistry, Biology and Ecology
Authors: Yamada Kiyoyuki , Ojika Makoto , Kigoshi Hideo 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Application of the Environmental Product Declaration of Waste Disposal in a Sanitary Landfill: 4 Case Studies
Authors: Del Borghi Adriana , Binaghi Laura , Del Borghi Marco , Gallo Michela 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Review of Procedures Involving Separation and Preconcentration for the Determination of Cadmium Using Spectrometric Techniques
Authors: Ferreira Sergio L. C. , de Andrade Jailson B. , Korn Maria das Gracas A. , Pereira Madson de G. , Lemos Valfredo A. , dos Santos Walter N. L. , Rodrigues Frederico de Medeiros , Souza Anderson S. , Ferreira Hadla S. , da Silva Erik G. P. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Molecular Mechanism of Emodin Action: Transition from Laxative Ingredient to an Antitumor Agent
Authors: Srinivas Gopal , Babykutty Suboj , Sathiadevan Priya Prasanna , Srinivas Priya 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
ODMR Spectroscopy of Molecular Functions in Photosynthetic Membrane Proteins
Authors: Giacometti G. , Agostini G. , Santabarbara S. , Carbonera D. 
Published: October 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Efficient and Practical Process for Pd/Cu CocatalyzedHomocoupling Reaction of Terminal Alkynes Using Sodium Percarbonate as a Dual Reagent in Aqueous Media
Authors: ZHOU Lei , ZHAN Hai‐Ying , LIU Hai‐Ling , JIANG Huan‐Feng 
Published: October 2007

AbstractA new process for the Pd/Cu co‐catalyzed homocoupling reaction of terminal alkynes was developed. The reaction was carried out in aqueous media with sodium percarbonate as both a clean oxidant and a base. Meanwhile, a palladium complex immobilized on a synthetic PS‐PEG400‐PPh2 resin was used as the catalyst, which may be recovered by simple filtration and reused for several times with high activity.
Thermochemistry on the Complex of Erbium Perchlorate with L‐α‐Glutamic Acid [Er2(L‐Glu)2(H2O)6](ClO4)4·6H2O(s)
Authors: DI You‐Ying , ZHANG Jian , TAN Zhi‐Cheng 
Published: October 2007

AbstractA coordination compound of erbium perchlorate with L‐α‐glutamic acid, [Er2(Glu)2(H2O)6](ClO4)4·6H2O(s), was synthesized. By chemical analysis, elemental analysis, FTIR, TG/DTG, and comparison with relevant literatures, its chemical composition and structure were established. The mechanism of thermal decomposition of the complex was deduced on the basis of the TG/DTG analysis. Low‐temperature heat capacities were measured by a precision automated adiabatic calorimeter from 78 to 318 K. An endothermic peak in the heat capacity curve was observed over the temperature region of 290–318 K, which was ascribed to a solid‐to‐solid phase transition. The temperature Ttrans, the enthalpy ΔtransHm and the entropy ΔtransSm of the phase transition for the compound were determined to be: (308.73±0.45) K, (10.49±0.05) kJ·mol−1 and (33.9±0.2) J·K−1·mol−1. Polynomial equation of heat capacities as a function of the temperature in the region of 78–290 K was fitted by the least square method. Standard molar enthalpies of dissolution of the mixture [2ErCl3·6H2O(s)+2L‐Glu(s)+6NaClO4·H2O(s)] and the mixture {[Er2(Glu)2(H2O)6](ClO4)4·6H2O(s)+6NaCl(s)} in 100 mL of 2 mol·dm−3 HClO4 as calorimetric solvent, and {2HClO4(l)} in the solution A' at T=298.15 K were measured to be, ΔdHm,1= (31.552±0.026) kJ·mol−1, ΔdHm,2= (41.302±0.034) kJ·mol−1, and ΔdHm,3= (14.986±0.064) kJ·mol−1, respectively. In accordance with Hess law, the standard molar enthalpy of formation of the complex was determined as ΔfH⊖m = − (7551.0±2.4) kJ· mol−1 by using an isoperibol solution‐reaction calorimeter and designing a thermochemical cycle.
Synthesis of an Anionic Receptor Based on Phenylhydrazone Group and Its Recognition Property for Acetate
Authors: WANG Yue‐Hong , LIN Hai , LIN Hua‐Kuan 
Published: October 2007

AbstractA colorimetric anion receptor was synthesized by a simple method where the phenylhydrazone moiety was need as binding sites. The anion recognition via hydrogen‐bonding interactions can be easily monitored by anion complexation induced changes in UV‐vis absorption spectra. Moreover, the hydrogen bond formation between the phenylhydrazone NH and acetate or fluoride anion was described on the basis of 1H NMR experiments.
Direct and Simultaneous Determination of Phenol, Hydroquinone and Nitrophenol at Boron‐Doped Diamond Film Electrode
Authors: ZHAO Guo‐Hua , TANG Yi‐Ting , LIU Mei‐Chuan , LEI Yan‐Zhu , XIAO Xiao‐E 
Published: October 2007

AbstractThe electrochemical characteristics of multi‐component phenolic pollutants, such as phenol (Ph), hydroquinone (HQ) and 4‐nitrophenol (4‐NP), were investigated on boron‐doped diamond (BDD) film electrode by differential pulse voltammetry (DPV) technique. A simple and feasible platform was accordingly established for the direct and simultaneous determination of these three phenolic pollutants. Results showed that, Ph, HQ and 4‐NP gave obvious oxidation peaks on BDD electrode at the potential of 1.24, 0.76 and 1.52 V, respectively. Each of them displayed good linear relationship between their oxidation peak currents and their corresponding concentrations in a rather wide range coexisting with one or two of the other phenolic pollutants. The detection limits of Ph, HQ and 4‐NP were estimated to be as low as 1.82×10−6, 1.67×10−6 and 1.44×10−6 mol·L−1, respectively. Therefore, a promising direct and simultaneous electrochemical determination method of multi‐component phenolic pollutants in wastewater samples was constructed successfully on BDD electrode with advantages being rapid, simple, convenient, sensitive, in situ and inexpensive.
Spin‐orbit Coupling and Intersystem Crossing in 4H‐Pyran‐4‐thione: CASSCF//TD‐B3LYP Study
Authors: LÜ Ling‐Ling , LIU Xin‐Wen , YUAN Kun , WANG Yong‐Cheng , WANG Han‐Qing 
Published: October 2007

AbstractThe intersystem crossing channels of gaseous 4H‐pyran‐4‐thione were investigated using the CASSCF//TD‐B3LYP methods and group theory. Using the effective one‐electron spin‐orbit Hamiltonian, the strengths of spin‐orbit coupling were estimated, which plays an essential role in the spin transitions between different spin states. Calculated results show that phosphorescence and non‐radiative decay via intersystem crossing to the S0 state are concurrent processes occurring at the T1 state. A rapid depletion of the S1 state via intersystem crossing to the T1 state can be mediated by the T2 state, if spin relaxation is fast within the triplet levels. Our calculated results are in close agreement with experimental observations.
Selective Hydrogenation of Avermectin Catalyzed by Iridium‐Phosphine Complexes
Authors: MA Xiao‐Yan , WANG Kun , ZHANG Lei , LI Xian‐Jun , LI Rui‐Xiang 
Published: October 2007

AbstractA series of new iridium complexes, IrCl(COD)(TMOPP) (1) [COD=1,5‐cyclooctadiene, TMOPP=tris(4‐ methoxyphenyl)phosphine], IrCl(COD)(TFMPP) (2) [TFMPP=tris(4‐trifluoromethylphenyl)phosphine], IrCl‐ (COD)(BDNA) (3) [BDNA=1,8‐bis(diphenylphosphinomethyl)naphthalene], IrCl(COD)(BISBI) (4) [BISBI=2,2′‐bis(diphenylphosphinomethyl)biphenyl] and IrCl(COD)(BDPB) (5) [BDPB=1,2‐bis(diphenylphosphinometh‐ yl)benzene], were synthesized and characterized by NMR spectra and elemental analyses. In order to obtain the relationships between complex structures and their catalytic properties, IrCl(COD)(DPPM) (6) [DPPM=bis(diphenylphosphino)methane], IrCl(COD)(DPPE) (7) [DPPE=1,2‐bis(diphenylphosphino)ethane], IrCl(COD)(DPPP) (8) [DPPP=1,3‐bis(diphenylphosphino)propane] and IrCl(COD)(TPP) (9) [TPP=triphenylphosphine], were also synthesized according to the reported methods. The hydrogenation results showed that the low electronic density at the central metal was favorable to increase the catalytic activity for the hydrogenation of avermectin, but decrease the selectivity to ivermectin. The complex with a large chelating ring and a bulky chelating backbone would easily cause the cleavage of CO bond in avermectin to give a byproduct avermectin aglycon.