1-(Octahydro-3,6,8,8-tetramethyl-1H-3a,7-methanoazulenyl)acetone, didehydro derivative 68867-57-2 EINECS 272-519-2 Ethanone, 1-(octahydro-3,6,8,8-tetramethyl-1H-3a,7-methanoazulenyl)-, didehydro deriv.