tokens: Compound 7e , 5 - { 2 - [ 4 - ( 1 , 2 - dihydro - 2 - acenaphthylenyl ) piperazinyl ] ethyl } - 2 , 3 - dihy dro - 1H - indol - 2 - one , from this series showed significant affinities at the 5 - HT1A and 5 - HT2A receptors and moderate affinity at the D2 receptor .