We are trying to track down a source of the cancer chemotherapeutic CCNU (=1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea), having been told that Sigma/Aldrich no longer sell it. Can anyone help? Thanks Simon Easterbrook-Smith Dept of Biochem. Univ. of Sydney Sydney NSW 2006 Australia FAX + 612 351 4726 Phone + 612 351 3905 email sbe at biochem.usyd.edu.au