(1aR,2R,7S,7aS)-4-methyl-2,2a,7,7a-tetrahydro-1H-2,7-ethenocyclopropa[b]naphthalene-3,6(1aH,6aH)-dione

2,6-二甲基-1,4-苯二酚

2-(cyclohepta-2,4,6-trien-1-yl)-3,5-dimethylcyclohexa-2,5-diene-1,4-dione

cyclohepta-1,3-diene

1,4-环庚二烯