New aromatic glucosides from Carthamus tinctorius.

Three new aromatic glucosides, 2,3-dimethoxy-5-methylphenyl-1-O-beta-d-glucopyranoside (1), 2,6-dimethoxy-4-methylphenyl-1-O-beta-d-glucopyranoside (2), and ethyl-3-(4-O-beta-d-glucopyranosyl-3-methoxyphenyl)propionate (3), named as carthamosides B1, B2, and B3, respectively, along with three known aromatic glucosides, methyl-3-(4-O-beta-D-glucopyranosyl-3-methoxyphenyl)propionate (4), ethylsyringin (5), and methylsyringin (6), have been isolated from the air-dried flower of Carthamus tinctorius. Their structures were identified on the basis of chemical and spectroscopic methods.