_chemical_formula_项目指定化合物的组成和化学性质。分子式数据项必须与指定密度、晶胞和Z值的数据项一致。以下规则适用于数据项_chemical_formula_analytical、*_structural和*_sum的构造。对于数据项*_moiety,分子式构造被分解为残基或部分,即形成分子单元或分子离子的原子组。下面给出的规则适用于每个部分,但不同的...
is a substituent as defined within; Q1 is optionally substituted phenyl, and Q1 bears a substituent of formula (Ia) wherein: X, Y<1>, Y<2>, Z, n, and m are as defined within; -NQ2 is an optionally substituted heterocyclic moiety containing one hydrogen heteroatom and optionally containin...
benzoyl unit, and hexose moiety. M17and M18were deduced as benzoyloxypaeoniflorin and its isomer. M19displayed the [M−H]−ion atm/z583.18210 (C30H31O12), which had one less oxygen than that of M17and M18. By comparing and the analysis of their MS/MS spectra, the absence of ion at...
H-15b), in accordance with a terminal double bond atδC117.0 (t) in13C NMR spectrum which was supported by the HSQC experiment. The protons atδH3.42 (1H, d,J= 3.9 Hz, H-2) andδH3.99 (1H, d,J= 3.9 Hz, H-3) with the same coupling constant indicated an epoxy moiety which ...
Compound 1 is a highly hydroxy- substituted bisabolene derivative and the first bisallylic alcohol oxygenated at C-2 with a cinnamate moiety. Results and Discussion Compound 1 was isolated from the ethyl acetate ex- tract of the leaves of F. petelotii as a colorless oil. The structure of 1...
“dipeptides” represents the most dominant moiety of Valclavam’s structure. However, the notion of what is most descriptive can vary from one user to another, and from one context to another. For example, a cyclic depsipeptide could be also be classified as a lactam. Because of this ...
Acute toxicity test of Tetrastigma Hemsleyanum aerial part formula granules Fujian J. Tradit. Chin. Med., 50 (2019), pp. 63-65 Google Scholar Xiong, 2015 Y. Xiong Studies on Tetrastigma hemsleyanum Extracts' Bioactivities and Mechanism of Apoptosis in HeLa Cells Induced by its Active Extracts...
As a result, the saccharide groups in the structures were identified using the neutral losses of the sugar moiety. Compound 96 was positively identified as glycyrrhizic acid using a reference standard. The MS fragmentation pattern of glycyrrhizic acid was studied in depth to contribute to the ...
the radiation-labile protecting groups are removed. The surface is then contacted with a solution containing a desired monomer. The monomer has at least one site that is reactive with the newly exposed reactive moiety on the linker and at least a second reactive site protected by one or more ...
Whenever in the specification hereof and the claims appended thereto in any structural formula contained therein a curved line ( ) is employed in the linkage of atoms, it is meant to denote that the substituent moiety may be, stereochemically, in either the α- or β-position, depending upon...