title: Two new ent-kaurane diterpenoids from Pteris semipinnata.
abstract: In this study, two new compounds and six known compounds were isolated from the aerial parts of Pteris semipinnata. The chemical structures of these two new compounds were elucidated as 6β,11α-dihydroxy-15-oxo-ent-kaur-16-en-19-oic acid (1) and 7α,11α-dihydroxy-15-oxo-ent-kaur-16-en-19-oic acid (2) by the extensive spectral methods including 2D NMR and HR-MS techniques.
authors.affiliation: a School of Pharmacy, Dalian Medical University , Dalian , 116044 , China.
authors.forename: Rong
authors.initials: R
authors.lastname: Bai
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhou
authors.forename: Sa
authors.initials: S
authors.lastname: Deng
authors.forename: Pei-Pei
authors.initials: PP
authors.lastname: Dong
authors.forename: BaoJing
authors.initials: B
authors.lastname: Zhang
authors.forename: ShanShan
authors.initials: S
authors.lastname: Huang
authors.forename: ChangYuan
authors.initials: C
authors.lastname: Wang
authors.forename: Hou-Li
authors.initials: HL
authors.lastname: Zhang
authors.forename: Yan-Yan
authors.initials: YY
authors.lastname: Zhao
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Xiao-chi
authors.initials: XC
authors.lastname: Ma
mesh_terms: D045786:Diterpenes, Kaurane / Q000737:chemistry / Q000302:isolation & purification*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D032495:Pteris / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: C586002:6beta,11alpha-dihydroxy-15-oxo-ent-kaur-16-en-19-oic acid; C586003:7alpha,11alpha-dihydroxy-15-oxo-ent-kaur-16-en-19-oic acid; D045786:Diterpenes, Kaurane; D004365:Drugs, Chinese Herbal