Two new benzophenone glycosides from the fruit of Psidium guajava L.
The ripe edible fruits of Psidium guajava L. was phytochemically investigated, three benzophenone glycosides, 2, 6-dihydroxy-3, 5-dimethyl-4-O-beta-D-glucopyranosyl-benzophenone (1), 2, 6-dihydroxy-3-methyl-4-O-(6''-O-galloyl-beta-D-glucopyranosyl)-benzophenone (2), 2, 6-dihydroxy-3, 5-dimethyl-4-O-(6''-O-galloyl-beta-D-glucopyranosyl)-benzophenone (3) were isolated by means of chromatography, and their structures were elucidated on the basis of mass spectrometry, (1)H NMR, (13)C NMR, HSQC and HMBC data. Compounds 1 and 2 were new benzophenone glycosides, and here we report the complete spectroscopic assignments for 3.
Shu
Jicheng
J
MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Cai Lun Road 1200, Zhangjiang, Shanghai 201203, China.
Chou
Guixin
G
Wang
Zhengtao
Z
D000998:Antiviral Agents / Q000032:analysis; D001577:Benzophenones / Q000737:chemistry / Q000302:isolation & purification*; D005638:Fruit / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry; D031647:Psidium / Q000737:chemistry*
D000998:Antiviral Agents; D001577:Benzophenones; D006027:Glycosides