You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3,6-bis[2-(4-methylpiperazin-1-yl)-2-oxoethoxy]xanthen-9-one into SMILES representation.
user
CN1CCN(C(=O)COC2=CC=C3C(=O)C4=CC=C(OCC(=O)N5CCN(C)CC5)C=C4OC3=C2)CC1
assistant