Seven new aminoacyl sugars in Ipomoea batatas.
An analysis of the polar extracts from sweet potato Ipomoea batatas (Convolvulaceae) led to the isolation of seven unknown aminoacyl sugars. On the basis of 1D, 2D NMR, and mass spectrometry data, the structures of the compounds were elucidated as: beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-valyl]-glucopyranoside (1), beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-tyrosyl]-glucopyranoside (2), beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-threonyl]-glucopyranoside (3), beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-hystidyl]-glucopyranoside (4), 2-beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-alanyl]-glucopyranoside (5), beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-tryptophanyl]-glucopyranoside (6), and beta-D-fructofuranosyl-(2 --> 1)-alpha-D-[2-O-glycyl]-glucopyranoside (7).
Dini
Irene
I
Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli Federico II, Naples, Italy.
Tenore
Gian Carlo
GC
Trimarco
Elena
E
Dini
Antonio
A
D049148:Aminoacylation; D002236:Carbohydrate Conformation; D002241:Carbohydrates / Q000032:analysis* / Q000737:chemistry; D027723:Ipomoea batatas / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol; D010936:Plant Extracts / Q000737:chemistry; D035281:Plant Tubers / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013395:Sucrose / Q000032:analysis / Q000737:chemistry
D002241:Carbohydrates; D010936:Plant Extracts; D013395:Sucrose; D000432:Methanol