Twenty-one galactocerebrosides (1-21), including sixteen new compounds (3-7, 9-17, 19, 21), were identified from a cerebroside molecular species obtained from the chloroform/methanol extract of pyloric caeca dissected from the starfish Protoreaster nodosus. The structures of these galactocerebrosides were determined on the basis of chemical and spectroscopic evidences. Especially, one-pot GC-MS...

Sir: Decilorubicin,l) a new anthracycline antibiotic produced by Streptomyces virginiae MF-266-g4 yields three kinds of sugars on hydrolysis. As reported in a previous paper,') hydrogenolysis of decilorubicin methyl ester gave rhodosamine. Two other sugar components have been obtained as their methyl glycosides by methanolysis of decilorubicin. One of them, a new nitro sugar is named decilonitr...

The rational synthesis of a two-dimensional (2D) porous aromatic framework (PAF) with controllable growth direction remains challenge to overcome the limitation traditional stacked 2D materials. Herein, step-growth strategy is developed fabricate vertically oriented nitrogen-rich on graphene oxide (V-PAF-GO) using monolayer benzidine-functionalized GO (BZ-GO) as molecular pillar. Then, confined...

HPLC/ESI-MS analyses of alcohol solutions of ampicillin and amoxicillin have shown that the two drugs react very readily with alcohols (methanol and ethanol) at room temperatures, without the presence of any catalyst. Products of methanolysis were detected even when methanol was used as a mobile phase, in HPLC/ESI-MS analysis of a water solution of ampicillin and amoxicillin. Therefore, neither...

Chemical structures of photocured acrylic ester resins were characterized using specific decomposition techniques such as pyrolysis-gas chromatography in the presence of organic alkali and matrixassisted laser desorption/ionization mass spectrometry combined with super critical methanolysis. The resultant products formed through specific cleavage at the ester linkages in the cured resin samples...

A three-component coupling reaction of ortho-phthalaldehyde, 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide, and various primary amines readily afforded novel phosphorus-substituted stable isoindoles in good to excellent yields. The importance the reversible ring-opening 10-oxide by methanolysis became apparent.