<unk> , or simply<unk> , is an organic compound in the<unk>  class with the formula , sometimes abbreviated as (see Pseudoelement symbols). It is a colourless, highly volatile, sweet-smelling <unk> eal odour"), extremely flammable liquid. It is commonly used as a solvent in laboratories and as a starting fluid for some engines. It was formerly used as a general anesthetic, until non-flammable drugs were developed, such as halothane. It has been used as a recreational drug to cause intoxication.
Diethyl ether
Triphenylbromoethylene
Phenylsilatrane
Triphenylchloroethylene
Chloroform
Desmethylchlorotrianisene
Triphenylethylene
1,1,1,2-Tetrafluoroethane