6-Amino-1[(E)-4-butyramido-1-methyl- 2-pyrroleacryloyl]-3-chloromethylindoline Butanamide, N-[5-[3-[7-amino-3-(chloromethyl)-2,3-dihydro-1H-indol-1-yl]-3-oxo-1-propenyl]-1H-pyrrol-3-yl]-, (E)- NSC691655