You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethyl 5-amino-4-cyano-3-[[5-(2-methylphenyl)-1,3,4-oxadiazol-2-yl]sulfanylmethyl]thiophene-2-carboxylate .
user
C18H16N4O3S2
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