Mollugin , its cas register number is 55481-88-4. It also can be called Rubimaillin ; Methyl 6-hydroxy-2,2-dimethylbenzo[h]chromene-5-carboxylate ; 2H-Naphtho(1,2-b)pyran-5-carboxylic acid, 6-hydroxy-2,2-dimethyl-, methyl ester .