164120-26-7 7-beta(N-(2-Chloroethyl)-N-nitroso-N-carbonylaminoethyl)cholesterol N-(2-Chloroethyl)-N'-(2-((3-beta,7-beta)-3-hydroxycholest-5-en-7-yl)ethyl)-N-nitrosourea Urea, N-(2-chloroethyl)-N'-(2-((3-beta,7-beta)-3-hydroxycholest-5-en-7-yl)ethyl)-N-nitroso-