The origin of BZs stemmed from the 'diversity oriented,'81 search for a new tranquilizer. Chlordiazepoxide was synthesized in 1955 but was not evaluated in vivo until 3 years later when it was found to be a potent CNS depressant. The reason for not subjecting chlordiazepoxide to biological evaluation earlier was the fact that the compound was thought to be quinazoline-N-oxide 1, which resulted from the failed synthesis of heptoxdiazine 2 (Figure 2a). Several analogs of 1 were subjected to in vivo evaluation and all failed to show the desired effect. The attempted synthesis of 2 was performed simply because the compounds would be diverse relative to the known tranquilizers of the day
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It seems like you hear it all the time from nearly every one you know I'm SO stressed out!? Pressures abound in this world today. Those pressures cause stress and anxiety, and often we are ill-equipped to deal with those stressors that trigger anxiety and other feelings that can make us sick. Literally, sick.