title: Methylated anthocyanidin glycosides from flowers of Canna indica.
abstract: Methylated anthocyanin glycosides were isolated from red Canna indica flower and identified as malvidin 3-O-(6-O-acetyl-beta-d-glucopyranoside)-5-O-beta-d-glucopyranoside (1), malvidin 3,5-O-beta-d-diglucopyranoside (2), cyanidin-3-O-(6''-O-alpha-rhamnopyranosyl-beta-glucopyranoside (3), cyanidin-3-O-(6''-O-alpha-rhamnopyranosyl)-beta-galactopyranoside (4), cyanidin-3-O-beta-glucopyranoside (5) and cyanidin-O-beta-galactopyranoside (6) by HPLC-PDA. Their structures were subsequently determined on the basis of spectroscopic analyses, that is, (1)H NMR, (13)C NMR, HMQC, HMBC, ESI-MS, and UV-vis. Compounds (1-4) were found to be in major quantity while compounds (5-6) were in minor quantity.
authors.affiliation: 204 A Southern Laboratories, Facility for Ecological and Analytical Testing, Indian Institute of Technology, Kanpur 208 016, India.
authors.forename: Jyoti
authors.initials: J
authors.lastname: Srivastava
authors.forename: Padma S
authors.initials: PS
authors.lastname: Vankar
mesh_terms: D000872:Anthocyanins / Q000032:analysis* / Q000302:isolation & purification; D035264:Flowers / Q000737:chemistry*; D005697:Galactosides / Q000032:analysis; D005960:Glucosides / Q000032:analysis; D006027:Glycosides / Q000032:analysis* / Q000302:isolation & purification; D019906:Nuclear Magnetic Resonance, Biomolecular; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D019862:Zingiberales / Q000737:chemistry*
chemical_list: D000872:Anthocyanins; D005697:Galactosides; D005960:Glucosides; D006027:Glycosides