title: Bioactive selaginellins from Selaginella tamariscina (Beauv.) Spring.
abstract: A new selaginellin named selaginellin O (1), along with three other known selaginellins (2-4) were isolated from Selaginella tamariscina (Beauv.) Spring. On the basis of spectroscopic analysis, the structure of selaginellin O was demonstrated to be 4-[(4'-hydroxy-4-formyl-3-((4-hydroxyphenyl)ethynyl)biphenyl-2-yl)(4-hydroxyphenyl)methylene]cyclohexa-2,5-dien-1-one. Compound 1, 2 and 3 exhibited appreciable cytotoxic activity against cultured HeLa cells (human cervical carcinoma cells), as well as significant antioxidant activity.
authors.affiliation: State Key Lab of Urban Water Resource and Environment & the Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, PR China ; State Key Lab of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Chao
authors.initials: C
authors.lastname: Yang
authors.forename: Yutian
authors.initials: Y
authors.lastname: Shao
authors.forename: Kang
authors.initials: K
authors.lastname: Li
authors.forename: Wujiong
authors.initials: W
authors.lastname: Xia