[9-[(E)-3-[2-fluoro-4-(prop-2-enoyloxymethoxycarbonyloxy)phenyl]prop-2-enoyl]oxy-2,3-bis[[(E)-3-[2-fluoro-4-(prop-2-enoyloxymethoxycarbonyloxy)phenyl]prop-2-enyl]peroxy]-6,6,12,12-tetramethyl-5a,11a-dihydrochromeno[3,2-b]chromen-8-yl] (E)-3-[2-fluoro-4-(prop-2-enoyloxymethoxycarbonyloxy)phenyl]prop-2-enoate;[3,6,6,9,12,12-hexamethyl-2-(prop-2-enoyloxymethoxycarbonyloxy)-5a,11a-dihydrochromeno[3,2-b]chromen-8-yl]oxycarbonyloxymethyl prop-2-enoate