title: A new beta-naphthalenecarboxylic acid biglycoside from Chirita longgangensis var. hongyao.
abstract: To investigate the chemical constituents in the stems of Chirita longgangensis var. hongyao, methanol extract of the stems was subjected to column chromatography with various chromatographic techniques. One new beta-naphthalenecarboxylic acid biglycoside, 1, 4-dihydroxy-2-naphthalenecarboxylic acid methyl ester-4-O-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside (1) was isolated, along with two known compounds: isotaxiresinol 4-O-methyl ether (2) and (R)-7-hydroxy-alpha-dunnione (3). Compound 2 was first obtained from Chirita genus and compound 3 was isolated from this plant for the first time. All structures were elucidated on the basis of spectral and chemical evidence, and the NMR spectroscopic data of compound 2 was published for the first time.
authors.affiliation: School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China.
authors.forename: Man-yuan
authors.initials: MY
authors.lastname: Wang
authors.forename: Mu-xin
authors.initials: MX
authors.lastname: Gong
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Lan
authors.initials: L
authors.lastname: Yang
mesh_terms: D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: C575130:1,4-dihydroxy-2-naphthalenecarboxylic acid methyl ester-4-O-alpha-L-rhamnopyranosyl-(1-6)-beta-D-glucopyranoside; D005960:Glucosides; D009281:Naphthalenes