2H-1-benzopyran-2-one, 7-methoxy-8-(3-methyl-2-butenyl)- 7-methoxy-8-(3-methylbut-2-en-1-yl)-2H-chromen-2-one InChI=1/C15H16O3/c1-10(2)4-7-12-13(17-3)8-5-11-6-9-14(16)18-15(11)12/h4-6,8-9H,7H2,1-3H