[Studies on the flavonoids from the flowers of Hylocereus undatus].Zhong Yao Cai. 2011 May; 34(5):712-6.ZY
OBJECTIVE
To study the chemical constituents of the flowers of Hylocereus undatus.
METHODS
The constituents were isolated and purified by various modern chromatographic techniques. The structures of the compounds were elucidated based on their physicochemical properties and spectral analyses.
RESULTS
Thirteen compounds were isolated from the flowers of H. undatus. Their structures were elucidated as kaempferol (1), quercetin (2), isorhamnetin (3), kaempferol 3-O-alpha-L-arabinfuranoside (4), kaempferol 3-O-beta-D-glucopyranoside (5), quercetin 3-O-beta-D-glucopyranoside (6), isorhamnetin 3-O-beta-D-glucopyranoside (7), kaempferol 3-O-beta-D-galactopyranoside (8), quercetin 3-O-beta-D-galactopyranoside (9), kaempferol 3-O-beta-D-rutinoside (10), isorhamnetin 3-O-beta-D-rutinoside (11), kaempferol 3-O-alpha-L-rhamopyranosyl-(1 --> 6)-beta-D-galactopyranoside (12), and isorhamnetin 3-O-alpha-L-rhamopyranosyl-(1 --> 6)-beta-D-galactopyranoside (13).
CONCLUSION
All the compounds are isolated from this plant for the first time.