摘要:

AbstractThis paper reports the performance of a DB‐1 fused‐silica capillary column for analysis of mixtures of methoxime‐trimethylsilyl ether (MO‐TMS) derivatives of human urinary steroid extracts. DB‐1 is a non‐extractable bonded phase, equivalent in polarity to SE‐30 and OV‐1. In addition, a small reversed‐phase Sep‐Pak C18cartridge is used for extraction of steroid conjugates from urine, and for the extraction of freed steroids liberated by hydrolysis. Examples of urinary steroid analysis in normal adult males and in patients with multiple myeloma using the DB‐1 bonded phase fused silica capillary

ISSN:0009-4536    

DOI:10.1002/jccs.198500011

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractOpianic acid reacts with various hydrazines to yield either hydrazone (3, 6) or phthalazinone (4) derivatives depending upon the electronic properties of the substituent attached to the hydrazine molecule. Oxidative cyclization of opianic acid aroylhydrazones with iodine and yellow mercuric oxide gave the 1,3,4‐oxadiazole derivatives21. The aroylhydrazones were also condensatively cyclized by heating with acetic anhydride to give the 1,3,4‐oxadiazoline derivatives24. Structures assigned to the prepared compounds were corroborated by studying their chemical as well as their spectral characterist

ISSN:0009-4536    

DOI:10.1002/jccs.198500012

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractBy means of spectroscopic analysis, X‐ray crystallography and chemical correlation the heartwood of Taiwan hemlock was found to contain compounds of sterols, carboxylic acids, 13‐epimanool,omethoxyphenolics, coniferaldehyde, benzofuranoid neolignan, α‐conidendrin, tsugacetal, isolariciresinol, secoisolariciresinol, matairesinol, hydroxymatairesinol and oxomatairesinol. Among them (+)‐tsugacetal is a novel lignan acetal having an α‐conidendrin related structure with the acetal methoxy group at the

ISSN:0009-4536    

DOI:10.1002/jccs.198500013

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractReinvestigation of the nonvolatile fraction of the acetone extractive from the heartwood ofTaiwania cryptomerioidesHayata afforded taiwanin F which was established as 11‐hydroxy‐7‐oxohinokiol on the basis of spectral data and its synthesis from hinokiol. In addition, six known compounds, taiwanin A, savinin, taiwanin C, hinokiol, taiwanin E and diphyllin were also isolated from the same fra

ISSN:0009-4536    

DOI:10.1002/jccs.198500014

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractSeven kinds of flavones, β‐sitosterol, β‐sitosterol‐D‐glucoside, hesperidin, limonin, ferulic acid and succinic acid were isolated from the fruit peel ofCitrus tan

ISSN:0009-4536    

DOI:10.1002/jccs.198500015

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY