The crystal structure of lucidusculine hydriodide

(2α,5α)-1,5,6,9,9-Pentabromo-7-methoxy-2,3,3a,4,5,6-hexahydro-3a,6-methanoazulen-2-ol

“…, certain pagodanes (Prakash et al, 1988), some derivatives of zizaene-type sesquiterpenes (Ghisalberti, White & Willis, 1976;Coates, Farney, Johnson & Paul, 1969) and a number of alkaloidal materials (Sasaki & Hiram, 1971;Zheng et al, 1987;Yoshino & Litaka, 1966;Cygler, Przybylska & Edwards, 1982;Arbain, Byrne, Cannon, Patrick & White, 1990)• The structures of several mono-unsaturated perhydro-3a,6-methanoazulenes have also been established by X-ray analysis (Tochtermann et al, 1993), but the title compound appears to represent the first example of a doubly unsaturated system for which the structure has been determined crystallographically. The present study shows that both the six-membered ring and the saturated five-membered ring adopt envelope conformations.…”