Normacusine B, a tertiary indole alkaloid, was isolated in pure form from the root bark of Strychnos atlantica Krukoff & Barneby. In conscious unrestrained rats, normacusine B (1 mg/kg) decreased the mean arterial blood pressure (27.6 ± 8.4 mmHg, n = 6), followed by a significant increase in heart
Strychnine and brucine from the plant Strychnos nux vomica have been shown to have interesting pharmacological effects on several neurotransmitter receptors, including some members of the superfamily of ligand-gated ion channels. In this study, we have characterised the pharmacological properties of
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