Do all the thienodiazepine drugs have the lower benzene ring edit

Do all the thienodiazepine drugs have the lower benzene ring. - The diagram and 2 examples do.
Maybe its a carry over from the benzodiazapine drugs that bind to GABA - the lower benzene ring interacts with a lipophilic site on GABA. - Rod57 (talk) 00:32, 13 February 2017 (UTC)Reply

R7 edit

Interestingly one of the two examples Bentazepam has R7 as part of a cyclohexane ring. - Rod57 (talk) 23:37, 12 February 2017 (UTC)Reply