Structure of a 7,8-Epoxycembranoid Isolated from Tobacco-(single crystal X-ray analysis of title cembranoid (I) (space group: P21; Z = 2)). -(BERG, J.-E.; WAHLBERG, I.; Acta Crystallogr., Sect. C: Cryst. Struct. Commun. 48 (1992) 3, 566-568; Dep. Struct. Chem., Univ. Stockholm, S-106 91 Stockholm, Swed.; EN)