Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Alkylating agents used for treating leukemias, chlorambucil (left) and bufulfone (myleran, right) were patterned after toxic nitrogen mustard gas (center) during many design iterations. 3D chemical structures are from Pubchem; atom colors are: carbon, gray; hydrogens, small white; nitrogen, blue; sulfur, yellow; chloride, green; oxygen, red.
