6-Demethoxyageratochromene (17598-02-6) also can be called Precocene I ; 7-Methoxy-2,2-dimethylchromene ; 2,2-Dimethyl-2H-chromen-7-yl methyl ether ; 7-Methoxy-2,2-dimethyl-2H-1-benzopyran ;and ; 7-Methoxy-2,2-dimethyl-2H-chromen .