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What is the molecular formula of the compound with this IUPAC name (2'R,5'S,11'S,14'S,18'E)-2',11'-dimethyl-14'-propan-2-ylspiro[1,4-dioxane-2,17'-15-oxa-3,9,12,26,29-pentazatetracyclo[18.5.3.15,9.023,27]nonacosa-1(26),18,20(28),21,23(27),24-hexaene]-4',10',13',16'-tetrone ?
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C31H39N5O7
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