6-甲基-2,3,4,9-四氢-1H-咔唑-1-酮

4,5,6,7-四氢-2-甲基苯并恶唑

2,3,5,6,7,8-hexahydro-1,4-benzodioxine

2,3,4,9-四氢-8-甲基-1H-咔唑

2-羟基-2-环己烯-1-酮