7-cyclopentyloxy-2,2-dimethylchromene

7-ethoxy-2,2,8-trimethylchromene

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

5-methoxy-7-(methoxymethoxy)-2,2-dimethylchromene

2,2-dimethyl-3,4-dihydrochromene-4,7-diol