2-Hydroxy-4-(7-hydroxy-8-methoxy-2-oxo-2H-chromen-3-yl)-2-methyl-but-3-enoic acid methyl ester 3-butenoic acid, 2-hydroxy-4-(7-hydroxy-8-methoxy-2-oxo-2H-1-benzopyran-3-yl)-2-methyl-, methyl ester, (3E)- InChI=1/C16H16O7/c1-16(20,15(19)22-3)7-6-10-8-9-4-5-11(17)13(21-2)12(9)23-14(10)18/h4-8,17,20H,1-3H3/b7-6 Phebaclavin H methyl (3E)-2-hydroxy-4-(7-hydroxy-8-methoxy-2-oxo-2H-chromen-3-yl)-2-methylbut-3-enoate