“In addition to a direct vasoconthe serotonin-blocking action …, a ganglion-blocking action, is studied here; f) I-hydrazino-phthalazine diminishes the pressor and … action of serotonin ( I , I I) ; this effect is examined further; g) because of a … serotonin, calycanthine, sempervirine, quinamine, serpentine and lysergic acid were studied.”