3d image of n-ethyl-n-nitrosourea skeletal formula

n-ethyl-n-nitrosourea enu mutagen gene toxic alkylating agent ethyl group nucleobases nucleic acid spermatogonial stem cells sperm mutagenesis genetic phenotype genetic screen genome 3d mutagenic teratogen genotoxic carcinogen cancer carcinogenicity carcinogenic tumor promotion malignancy angiogenesis poison venom toxicant toxicity toxin toxicology poisoning danger hazard acute harmful kill exposure limit antidote intoxication detoxification