1,4-Dihydroxy-2-(7'-methyl-3-methylene-1'-oxo-4',7'-peroxide-octyl)benzene 1-(2,5-Dihydroxy-phenyl)-3-(6,6-dimethyl-[1,2]dioxan-3-yl)-but-3-en-1-one 1-(2,5-dihydroxyphenyl)-3-(6,6-dimethyl-1,2-dioxan-3-yl)but-3-en-1-one 3-buten-1-one, 1-(2,5-dihydroxyphenyl)-3-(6,6-dimethyl-1,2-dioxan-3-yl)- InChI=1/C16H20O5/c1-10(15-6-7-16(2,3)21-20-15)8-14(19)12-9-11(17)4-5-13(12)18/h4-5,9,15,17-18H,1,6-8H2,2-3H