To meet the need of experimental reseach of stomach cancer, the author synthesized the carcinogen, N—ethyl—N'—nitro—N—nitrosoguanidine (ENNG) with guanidine as raw material by the procedures of addition reacction, dehydration, ethylation, nitrosylation, etc.The product was proved by analyses of elements, detections of ultraviolet spectrum, infrared spectrum, nuclear magnetic resonance spectrum.This carcinogen can induce the cancer to occur in a short time, no sarcoma occurs.The carcinoma induced by this carcinogen may transfer to lymph nod...
