Nitrosourea is both the name of a molecule, and a class of compounds that include a nitroso (R-NO) group and a urea.
Examples
Examples include:
Arabinopyranosyl-N-methyl-N-nitrosourea (Aranose)
Carmustine (BCNU, BiCNU)
Chlorozotocin
Ethylnitrosourea (ENU)
Fotemustine
Lomustine (CCNU)
Nimustine
N-Nitroso-N-methylurea (NMU)
Ranimustine (MCNU)
Semustine
Streptozocin (Streptozotocin)Nitrosourea compounds are DNA alkylating agents and are often used in chemotherapy. [Source: Wikipedia 
]
