Using O=CO, O=c1[nH]c(=S)n(CC2CCCNC2)c2cc[nH]c12 to produce CN1CCCC(Cn2c(=S)[nH]c(=O)c3[nH]ccc32)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.