8-hydroxy-7-methoxy-3,4,5-trimethylnaphtho[2,3-b]furan-9(4H)-one InChI=1/C16H16O4/c1-7-5-10(19-4)14(17)13-11(7)9(3)12-8(2)6-20-16(12)15(13)18/h5-6,9,17H,1-4H naphtho[2,3-b]furan-9(4H)-one, 8-hydroxy-7-methoxy-3,4,5-trimethyl-