A new seco-abietane-type diterpenoid, 13S-hydroxy-9-oxo-9,10-seco-abiet-8(14)-en-18,10α-olide (1) along with a known lignan compound, pinoresinol (2) was isolated from the stem bark of Picea glehni (Fr. Schm.) Masters. Spectroscopic methods and chemical conversions were used to establish the structure of 1. In order to assess their cancer chemopreventive potential, the inhibition of Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol 13-acetate (TPA) was examined for compound 1, its synthetic analogue, 9,10-seco-8S,13S-epoxy-abiet-8(14)-en-18,10α-olide (1a) and 2. The inhibitory effect of 1a on EBV-EA induction was strong (0, 20.7, 67.1 and 89.2 % inhibition at 1000, 500, 100 and 10 mol ratio/TPA). The IC50 of 1a was 226 mol ratio/32 pmol/TPA.
一种新的仲
松香烷型二
萜类化合物 13S-羟基-9-氧代-9,10-seco-abiet-8(14)-en-18,10±-olide(1)和一种已知的
木质素化合物 pinoresinol(2)被从 Picea glehni (Fr. Schm.) Masters 的茎皮中分离出来。为了评估它们的癌症
化学预防潜力,研究了化合物 1、其合成类似物 9,10-seco-8S,13S-epoxy-abiet-8(14)-en-18,10±-olide(1a)和 2 对 12-O-tetradecanoylphorbol 13-acetate (
TPA) 诱导的 Epstein-Barr 病毒早期抗原(EBV-EA)激活的抑制作用。1a 对 EBV-EA 诱导的抑制作用很强(在 1000、500、100 和 10 摩尔比/
TPA 下,抑制率分别为 0%、20.7%、67.1% 和 89.2%)。1a 的 IC50 为 226 摩尔比/32 pmol/
TPA。