Triazenes

Dacarbazine is a triazene used in the treatment of melanoma and Hodgkin's lymphoma.
Triacsin C is a triazene made by certain bacteria species.

Triazenes are organic compounds that contain the functional group R1−N=N−NR2R3, where the R are each any of various types of substituent groups. Some medications and dyes are triazenes. Formally, the triazenes are related to the unstable chemical triazene, H2N−N=NH.