272N18 (3-(3-nitrophenyl)-11-phenyl-2,3,4,5,10,11-hexohydro-1H-dibenzo[b,e] [1,4]diazepin-1-one dihdrochloride) increases lifespan by 20%, bears a structural resemblance to certain human antidepressants that affect signalling by the neurotransmitter serotonin.
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