Using Clc1cccc(-c2nn3c(c2-c2ccnc4ccccc24)CCC3)n1, CCCCC([Sn])=C(CCCC)CCCC to produce C=Cc1cccc(-c2nn3c(c2-c2ccnc4ccccc24)CCC3)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.