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 N-[3-(3-thiophen-2-yl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)phenyl]cyclopropanecarboxamide .
user
C19H15N5OS
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