1-(3,4-dihydroxyphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one 2-propen-1-one, 1-(3,4-dihydroxyphenyl)-3-(4-methoxyphenyl)- InChI=1/C16H14O4/c1-20-13-6-2-11(3-7-13)4-8-14(17)12-5-9-15(18)16(19)10-12/h2-10,18-19H,1H3/b8-4