You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[3-(4-methyl-2-thiophen-2-yl-1,3-thiazol-5-yl)-6-oxopyridazin-1-yl]ethyl]cyclopentanecarboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H22N4O2S2
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