Using S=P12SP3(=S)SP(=S)(S1)SP(=S)(S2)S3, CCCCCn1c(=O)[nH]c(=O)c2c1ncn2Cc1ccccc1 to produce CCCCCn1c(=O)[nH]c(=S)c2c1ncn2Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.