(organic chemistry) A mildly toxic pungent compound, C₃H₅NCS, obtained from the seeds of black mustard (Brassica nigra) or prepared synthetically, used as an animal repellent, etc.

(organic chemistry) The chlorinated derivative of propene 3-chloropropene that is used in the manufacture of pesticides and pharmaceuticals etc

(organic chemistry) The unsaturated aliphatic alcohol CH₂=CH-CH₂-OH