A new C-methylated homoisoflavanone together with four known rare methyl-homoisoflavanones and one known 9,19-cyclolart triterpenoid were isolated and characterised from the rhizomes of Polygonatum odoratum. The structure of the new compound was determined as 3-(4'-methoxy-benzyl)-5,7-dihydroxy-6-methyl-8-methoxy-chroman-4-one (1). The four known methyl-homoisoflavanones were determined as 3-(4'-methoxy-benzyl)-5,7-dihydroxy-6,8-dimethyl-chroman-4-one (2), 3-(4'-hydroxy-benzyl)-5,7-dihydroxy-6,8-dimethyl-chroman-4-one (3), 3-(4'-hydroxy-benzyl)-5,7-dihydroxy-6-methyl-8-methoxy-chroman-4-one (4) and 3-(4'-hydroxy-benzyl)-5,7-dihydroxy-6-methyl-chroman-4-one (5). The one 9,19-cyclolart triterpenoid was determined as 9,19-cyclolart-25-en-3beta,24 (R)-diol (6). Compound 2, 5, 6 were isolated for the first time from the Polygonatum genus. The compounds (1,3-6) were found to be strong against the growth of bacteria and plant pathogenic fungi.
Three steroidal saponins were isolated and characterised from the rhizomes of Polygonatum odoratum. The structure of the compounds were determined as 3-O-beta-D-glucopyranosyl-(1 --> 2)-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucopyranosyl-(1 --> 4)-galactopyranosyl-25(S)-spirost-5(6)-en-3beta-ol (1), 3-O-beta-D-glucopyranosyl-(1 --> 2)-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucopyranosyl-(1 --> 4)-galactopyranosyl-25(S)-spirost-5(6),14(15)-dien-3beta-ol (2) and 3-O-beta-D-glucopyranosyl-(1 --> 2)-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucopyranosyl-(1 --> 4)-galactopyranosyl-25(S)-spirost-5 (6)-en-3beta, 14alpha-diol (3). Compound 2 was identified as a new compound. Compounds 1-3 were found to be strong against the growth of bacteria and plant pathogenic fungi.
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