26896-50-4 30772-79-3 31308-56-2 4,7-Methano-1H-indenecarboxaldehyde, octahydro- EINECS 250-333-2 Octahydro-4,7-methano-1H-indene-carboxaldehyde Octahydro-4,7-methano-1H-indenecarbaldehyde