- C4H3S2CO
- Thienone Thi"["e]*none, n. [Thi["e]nyl + ketone.] (Chem.) A ketone derivative of thiophene obtained as a white crystalline substance, {(C4H3S)2.CO}, by the action of aluminum chloride and carbonyl chloride on thiophene. [1913 Webster]
The Collaborative International Dictionary of English. 2000.