You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3'R,4S,6'R,7'S,8'E,11'S,15'R)-13'-acetyl-7-chloro-7'-hydroxy-16',16'-dioxospiro[2,3-dihydro-1H-naphthalene-4,25'-23-oxa-16lambda6-thia-1,13,17-triazapentacyclo[17.7.2.03,6.011,15.022,27]octacosa-8,19(28),20,22(27)-tetraene]-18'-one by IUPAC nomenclature, provide its molecular formula.
user
C34H40ClN3O6S
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