Using COC(=O)c1ccc2c(c1)nc(Cc1cccs1)n2CC1CCCCC1 to produce O=C(O)c1ccc2c(c1)nc(Cc1cccs1)n2CC1CCCCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.