164120-29-0 7-beta-(2-Chloroethyl-N-nitroso-N-carbonylaminomethyl)cholesterol N-(2-Chloroethyl)-N'-(((3-beta,7-beta)-3-hydroxycholest-5-en-7-yl)methyl)-N-nitrosourea Urea, N-(2-chloroethyl)-N'-(((3-beta,7-beta)-3-hydroxycholest-5-en-7-yl)methyl)-N-nitroso-