For example , the ethyl mercaptan ( ethanethiol ) has the formula C H SH .
In the above reaction , RSH is a mercaptan and R signifies an organic group such as a methyl , ethyl , propyl or other group .
The ethyl mercaptan ( ethanethiol ) has the formula C H SH .
In the above reaction , RSH is a mercaptan and R signifies an organic group such as a methyl , ethyl , propyl or other group .