Structure Identification: |
Nat Prod Commun. 2015 Jul;10(7):1191-3. | Chemical Constituents of Pyrrosia calvata.[Pubmed: 26411008] | METHODS AND RESULTS:
A novel flavanone glycoside, 3',5',5,7-tetrahydroxy-6-C-β-D-glucopyranosyl-flavanone (1), along with 16 known compounds, (R/S)-eriodictyol-8-C-β-D-glucopyranoside ((R)-Eriodictyol-8-C-beta-D-glucopyranoside,2), quercetin-3-O-α-L-rhamnosyl (1''' --> 3''')-β-D-glucopyranoside (3), hemipholin (4), 4β-carboxymethyl-(-)-epicatechin methyl ester (5), kaempferol (6), quercetin (7), mangiferin (8), chlorogenic acid (9), 1,5-O-dicaffeoylquinic acid (10), 3,5-O-dicaffeoylquinic acid (11), 3-O-caffeoylquinic acid methyl ester (12), 1-O-caffeoyl glycoside (13), 4-O-β-D-glucopyranosyl-caffeic acid (14), 3'-O-methyleplcatechin-7-O-β-D-glucopyranoside (15), hop-22(29)-en-30-ol (16) and diploptene (17), were isolated from the whole plant of Pyrrosia calvata (Backer) Ching.
CONCLUSIONS:
Among them, compounds 2, 3, 4, 10, 11, 13 and 14 were isolated from the family Polypodiaceae for the first time, and compound 5 has not been recorded previously from the genus Pyrrosia. |
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