((Chloro-2 ethyl)-3 nitroso-3 ureido)-1', alpha,beta-D-ribopyrannose 65163-19-1 BRN 1393880 N-(2-Chloroethyl)-N-nitroso-N'-beta-D-ribopyranosylurea Urea, N-(2-chloroethyl)-N-nitroso-N'-beta-D-ribopyranosyl-