Using O=c1[nH]c2c(c(=O)n1Cc1ccccc1)CNCC2, C=O to produce CN1CCc2[nH]c(=O)n(Cc3ccccc3)c(=O)c2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.