87230-62-4 BRN 6261314 L-Valinamide, N(sup 2),N(sup 6)-bis(((2-chloroethyl)nitrosoamino)carbonyl)-L-lysyl-L-prolyl- N(sup 2),N(sup 6)-Bis(((2-chloroethyl)nitrosoamino)carbonyl)-L-lysyl-L-prolyl-L-valinamide