You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-(4-chlorophenyl)-3-[11,23-dibutyl-17-[2-(4-chlorophenyl)-4-oxoquinazolin-3-yl]-26,28-dihydroxy-25,27-dipropoxy-5-pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(24),3,5,7(28),9,11,13(27),15(26),16,18,21(25),22-dodecaenyl]quinazolin-4-one by IUPAC nomenclature, provide its molecular formula.
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C70H66Cl2N4O6
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