87230-64-6 L-Valinamide, N(sup 2)-(((2-chloroethyl)nitrosoamino)carbonyl)-L-lysyl-L-prolyl-, monohydrochloride N(sup 2)-(((2-Chloroethyl)nitrosoamino)carbonyl)-L-lysyl-L-prolyl-L-valinamide hydrochloride