title: A pair of 3-epimeric physalins from Physalis alkekengi L. var. franchetii.
abstract: A pair of new 3-epimeric steroids possessing a rare 13,14-seco-16,24-cycloergostane skeleton, 3alpha-methoxy-2,3-dihydro-4,7-didehydrophysalin B (1), and 3beta-methoxy-2,3-dihydro-4,7-didehydrophysalin B (2) were isolated from the 60% EtOH extract of the stems and leaves of Physalis alkekengi L. var. franchetii. Their structures were characterized on the basis of spectral evidence.
authors.affiliation: Department of Natural Products Chemistry, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China.
authors.forename: Li
authors.initials: L
authors.lastname: Qiu
authors.forename: Zhi-Hu
authors.initials: ZH
authors.lastname: Jiang
authors.forename: Hong-Xia
authors.initials: HX
authors.lastname: Liu
authors.forename: Li-Xia
authors.initials: LX
authors.lastname: Chen
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Yao
authors.forename: Feng
authors.initials: F
authors.lastname: Qiu
mesh_terms: D007783:Lactones / Q000737:chemistry*; D015394:Molecular Structure; D032321:Physalis / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D012632:Secosteroids / Q000737:chemistry*
chemical_list: C539039:3alpha-methoxy-2,3-dihydro-4,7-didehydrophysalin B; D007783:Lactones; D012632:Secosteroids