cytellin and feruloyltyramine

A new 9,10-dihydrophenanthrene,1,5-dihydroxy-3,4,7-trimethoxy-9,10-dihydrophenanthrene (1) was isolated and identified from the whole plants of Dendrobium moniliforme, as well as 24 known compounds including hircinol (2), (2R*,3S*)-3-hydroxymethyl-9-methoxy-2-(4'-hydroxy-3',5'-dimethoxyphenyl)-2,3,6,7-tetrahydro-phenanthro[4,3-b]furan-5,11-diol (3), diospyrosin (4), aloifol I (5), moscatilin (6), 3,4'-dihydroxy-3',4,5-trimethoxybibenzyl (7), gigantol (8), 3,3'-dihydroxy-4,5-dimethoxybibenzyl (9), longicornuol A (10), N-trans-cinnamoyltyramine (11), paprazine (12), N-trans-feruloyl 3'-O-methyldopamine (13), moupinamide (14), dihydroconiferyl dihydro-p-coumarate (15), dihydrosinapyl dihydro-p-coumarate (16), 3-isopropyl-5-acetoxycyclohexene-2-one-1 (17), p-hydroxybenzaldehyde (18), vanillin (19), p-hydroxyphenylpropionic acid (20), vanillic acid (21), protocatechuic acid (22), (+)-syringaresinol (23), β-sitosterol (24) and daucosterol (25). Compounds 3, 4, 13, 16, 17 and 20 were isolated from the Dendrobium genus for the first time, and compounds 2, 5, 7, 9-12, 14, 15, 18, 21 and 22 were originally obtained from D. moniliforme.

Topics: Benzaldehydes; Bibenzyls; Cinnamates; Coumaric Acids; Dendrobium; Furans; Guaiacol; Lignans; Magnetic Resonance Spectroscopy; Molecular Structure; Phenanthrenes; Phenylpropionates; Plants, Medicinal; Sitosterols; Spectrometry, Mass, Electrospray Ionization; Tyramine

To study the chemical constituents from the branch of Trema angustifolia.. The compounds were isolated by silica gel column chromatography, and their structures were elucidated by means of spectral analysis.. Six compounds were identified as beta-sitosterol (I), viminalol (II), acetylursolic acid (III), oleanolic acid (IV), paprazine (V), moupinamide (VI).. All the compounds were isolated from this plant for the first time.

Topics: Chromatography, Gel; Coumaric Acids; Oleanolic Acid; Plant Stems; Plants, Medicinal; Sitosterols; Trema; Tyramine