7-羟基-2,2,8-三甲基-2,3-二氢-4H-苯并吡喃-4-酮

7-methoxy-2,2,8-trimethylchromene

7-ethoxy-2,2,8-trimethylchromene

2,2,8-trimethyl-7-propan-2-yloxychromene

7-methoxy-2,2,8-trimethyl-4-chromanone