title: Grayanane diterpenoids from pieris formosa
abstract: Two new diterpenoids, pierisformoside A (1) and pierisformosin D (2), and two known diterpenoids, asebotoxins VIII (3) and V (4), were isolated from leaves of Pieris formosa. Their structures were elucidated on the basis of spectral analysis, including 1H-1H COSY, 13C-1H COSY, HMBC, and NOESY experiments.
authors.affiliation: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China, and Department of Chemistry, The University of Hong Kong, Hong Kong, China.
authors.initials: LQ
authors.lastname: Wang
authors.initials: SN
authors.lastname: Chen
authors.initials: GW
authors.lastname: Qin
authors.initials: KF
authors.lastname: Cheng