Using CCCn1c(=S)[nH]c(=S)c2[nH]c(C3CC3)nc21, NC1CCCC1 to produce CCCn1c(=S)nc(NC2CCCC2)c2[nH]c(C3CC3)nc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.