Chemotherapy is a chemical method for treating cancer tumors. Cocktails of adapted chemicals are injected into the patient to treat the tumor and its potential metastases in a targeted manner.
Crotonaldehyde is a colorless or white liquid with a suffocating odor which turns a pale-yellow color on contact with air. It is used as an intermediate for production of sorbic acid and formerly was used in manufacture of n-butyl alcohol. It is formed during fossil fuel combustion.