Synonyms: 4,13-Dioxabicyclo[8.2.1]tridec-6-ene,9-bromo-3-(3-bromo-1,2-propadienyl)-12-chloro-5-methyl-,[1R-[1R*,3S*(R*),5S*,6E,9S*,10S*,12R*]]-; 4,13-Dioxabicyclo[8.2.1]tridec-6-ene,9-bromo-3-[(1R)-3-bromo-1,2-propadienyl]-12-chloro-5-methyl-,(1R,3S,5S,6E,9S,10S,12R)- (9CI); Obtusallene II