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Can you give the molecular formula of the molecule 3-[(3-bromo-4-methoxyphenyl)methyl]-5-ethyl-2-[[(1R,3S)-3-hydroxycyclopentyl]amino]-7,8-dihydroimidazo[2,1-b]purin-4-one;3-[(3-bromo-4-methylphenyl)methyl]-2-(cyclohexylamino)-5-ethyl-7,8-dihydroimidazo[2,1-b]purin-4-one;3-[(3-chloro-4-methylphenyl)methyl]-2-(cyclohexylamino)-5-ethyl-7,8-dihydroimidazo[2,1-b]purin-4-one ?
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C68H85Br2ClN18O5
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