The title compound, 5, 7-diallyloxy-4-methyl-2 H-1-benzopyran-2-one,(C 16 H 16 O 4), was prepared by condensation of ethyl acetoacetate with phloroglucinol followed by allylation of the 5, 7-dihydroxy-4-methylcoumarin thus obtained. The compound crystallizes into monoclinic space group P 2 1/c with unit cell parameters a= 7.531 (1) Å, b= 22.596 (4) Å, c= 8.090 (1) Å, β= 92.74 (2)°, Z= 4. The crystal structure was solved by direct methods using ...
