Structure of 441453. [1R-(1α,4β,4aβ,8aβ)]-1,2,3,4,4a,5,6,8a-Octahydro-4,7-dimethyl-1-(1-methylethenyl)-naphthalene; (1R,4R,4aS,8aR)-1,2,3,4,4a,5,6,8a-Octahydro-4,7-dimethyl-1-(1-methylethenyl)naphthalene; (-)-Amorpha-4,11-diene; Amorpha-4,11-diene