He asked another Pfizer chemist, Willard Welch, to synthesize some previously unexplored tametraline derivatives.
Welch then prepared stereoisomers of this compound, which were tested in vivo by animal behavioral scientist Albert Weissman.

Arch Gen Psychiatry -- Early Coadministration of Clonazepam With Sertraline for Panic Disorder, July 2001, Goddard et al.

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