A member of the class of chromenes that is 2H-chromene substituted by a methoxy group at position 7 and two methyl groups at position 2. ChEBI: Precocene I is a member of the class of chromenes that is 2H-chromene substituted by a methoxy group at position 7 and two methyl groups at position 2. It has a role as a member of precocenes and a plant metabolite. It is a member of chromenes and an aromatic ether.