You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(4-oxo-5-propylpyridazino[4,5-b]indol-3-yl)-N-[(2R)-4-phenylbutan-2-yl]acetamide into SMILES representation.
user
CCCN1C2=CC=CC=C2C2=C1C(=O)N(CC(=O)NC(C)CCC1=CC=CC=C1)N=C2
assistant