A Novel Acylated Pelargonidid 3-Sophoro-Side-5-Glucoside from Greyish-Purploe Flowers of the Japanese Morning Glory

摘要

A novel acylated anthocyanin was isolated fropm greyish-pureple flowers of a dingy mutant in the Japanese morning glory (Pharbitis nil or Iponoea nil) with three known pigments as main pigments. This novel pigment was determined to be pelargonidin 3-O-[2-O-(#beta#-D-glucopyranosyl)-6-O-(trans-4-O-(#beta#-D-glucopyranosyl)caffeoyl)-#beta#-D-glucopyranoside]-5-O-#beta#-glucopuyranoside (3), and the other three pigments (1,2, and 4) were 3-sophoroside-5-glucosides of pelargonidin and peonidin, and peonidin 3-O-[2-O-#beta#-D-glucopyranosyl-(6-O-#beta#-D-glucopyranosylcaffeoyl)-#beta#-D-glucoyransodie]-5-O-#beta#-D-glucopyranosie. In addition, pelargonidin 3-sophoroside and pelargonidin 3-glucoside were also detected as main pigments in two other mutants, duskish-1 and Duskish-2, displaying pale-purple hue flowers.