Using O=C1OCCO1, N#Cc1c(-c2ccccc2)c(-c2ccccc2)n[nH]c1=O to produce N#Cc1c(-c2ccccc2)c(-c2ccccc2)nn(CCO)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.