Synonyms: 2H-Cyclopropa[f]benzofuran-2-one,octahydro-5a-methyl-3-methylene-5-(3-oxobutyl)- (8CI);2H-Cyclopropa[f]benzofuran-2-one,octahydro-5a-methyl-3-methylene-5-(3-oxobutyl)-, [3aR-(3aa,4aa,5a,5aa,6aa)]-; 3-Norcaraneacetic acid, 4-hydroxy-6-methyl-a-methylene-7-(3-oxobutyl)-, g-lactone (7CI); Carabron;Carabrone; Caropesia lactone