Three new phenolic glycosides, named as equisetumoside A (3-methoxy-11,12-dihydroxy-phenylhexane-9- one-4-O-beta -D-glucopyranoside), equisetumoside B (3-methoxy-4,11-dihydroxy-phenylhexane-9-one12-O-beta -D-glucopyranoside) and equisetumoside C ( cis-ferulic acid potassium salt 4-O-beta -D-glucopyranoside) were isolated from the water-soluble extract of fertile sprouts of Equisetum, arvense L. (Equisetaceae), together with uridine, inosine, 2'-deoxyinosine, 2'-deoxycytidine, tryptophan, thymidine, 5-carboxy-2'-deoxyuridine, coniferin, and kaempferol 3-O-beta -D-sophoroside-7-O-beta -D-glucopyranoside. Their structures were elucidated by spectroscopic analysis and chemical transformation.
Three salts of labdanic acids, named as magnesium andrographate, disodium andrographate and dipotassium andrographate 19-O-beta -D-glucoside were isolated from the hydrophilic extract of Andrographis paniculata Nees. (Acanthaceae), together with guanosine, uridine, 6-epihardpagide, procumbide, violanthin and apigenin 7-O-beta -D-glucoside. Their structures were determined by spectroscopic analysis and chemical transformation.
Two new phenylpropanetriol glycosides, named as meliadanoside A (3 - methoxy- 5 - hydroxy-9- (1' - O-β-D-glucopyranosyl) - threo - phenylpropanetriol ) and meliadanoside B (4- hydroxy-7, 8- (2', 1' - O- β- D -glucopyranosyl) - phenylpropanetriol), were isolated from the water-soluble extract of the fruits of Meliatoosendan Sieb. et Zucc., along with threo-guaiacylglycerol. Their structures were elucidated by spectroscopic and chendcal analysis.
