1073-11-6 2(3H)-Furanone, 5-ethenyldihydro-5-methyl- 4-Methyl-4-vinyl-1,4-butanolide 40478-72-6 Dihydro-5-methyl-5-vinyl-2(3H)-furanone Dihydro-5-methyl-5-vinylfuran-2(3H)-one EINECS 214-024-6