label: 3,7-dihydro-3-methyl-7-((2E,6E,10Z)-3,7,11,15-tetramethyl-13-oxohexadeca-2,6,10-trien-1-yl)-6H-purin-6-one
label_lc: 3,7-dihydro-3-methyl-7-((2e,6e,10z)-3,7,11,15-tetramethyl-13-oxohexadeca-2,6,10-trien-1-yl)-6h-purin-6-one