“…methyl piperine, iperonaline, piperettine, asarinine, piperundecalidine, piperlonguminine, pregumidiene, brachystamide, brachystamide-A, brachystine, pipercide, longamide, tetrahydropiperine, dehydro-pipernonaline, piperidine, terahydropiperlongumine and trimethoxycinnamoyl-piperidinone has been found in the root of long pepper. The essential oil of the fruit contains caryophyllene, pentadecane, bisabolene, thujone, terpinolene, zingiberine, p-cymene, pmethoxyacetophenone and dihydro-carveol apart from piperine [94][95][96][97][98] . Maximum ACE inhibitory activity has been recorded by ethyl acetate and butanol fractions of black pepper with halfmaximal inhibitory concentration (IC 50 ) value of 1.40 ± 0.07 mg/ml and 1.75 ± 0.43 mg/ml, respectively 99 .…”