Demethylencecalin

Eupatoriochromene

Des-O-methylencecalin

6-Acetyl-7-hydroxy-2,2-dimethyl-2H-1-benzopyran

1-(2,2-Dimethyl-7-hydroxy-α-chromene-6-yl)ethanone

Methyl(2,2-dimethyl-7-hydroxy-2H-1-benzopyran-6-yl) ketone