Benzofuran 4 5 6 7 tetrahydro 3 6 dimethyl July 8, 2019 16 32 64 128 3 6 dimethyl 4 5 6 7 tetrahydro 1 benzofuran 2(4h)-benzofuranone 5 6 7 7a-tetrahydro-4 4 7a-trimethyl- (r)- 2(4h)-benzofuranone 5 6 7 7a-tetrahydro-6-hydroxy-4 4 7a-trimethyl- (6s-cis)-
