A New Pimarane-type Diterpenoid from the Seeds of Bowdichia virgilioides.

A new pimarane-type diterpenoid, sucupiol (1), and nine known -furanocassane-type diterpenoids, vouacapane (2), 7ß-hydroxyvouacapane (3) 7ß-acetox yvouacapane (4), 6α-hydroxyvouacapane (5), 6α-acetoxyvouacapane (6), sucutinirane F (7), sucutinirane E (8), 6α, 7ß-diacetoxyvouacapane (9), and 6α, 7ß-diacetoxyvouacapane-14ß-al (10), were isolated from the seeds of Bowdichia virgilioides and their structures were elucidated by using 2D NMR data. The isolation of I provides evidence to support the presence of intermediate A in the course of biosynthesis of furanocassane-type diterpenoids.