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'S,7'Z,9'R,12'R)-7-chloro-12'-ethyl-9'-hydroxy-13',13'-dioxospiro[2,3-dihydro-1H-naphthalene-4,22'-20-oxa-13lambda6-thia-1,14-diazatetracyclo[14.7.2.03,6.019,24]pentacosa-7,16(25),17,19(24)-tetraene]-15'-one by IUPAC nomenclature, provide its molecular formula.
user
C32H39ClN2O5S
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