According to studies performed on Piper marginatum Jacq by other authors [43, 47, 48], exceptional antimicrobial activity from total ethanol extract and factions from this plant could be attributed to presence of secondary metabolites, such as alkaloids, neolignans, terpenoids, flavones, flavonoids,
propenyl phenols, aliphatic amides, and aromatic amides.
detailing a "grafted copolymer of cross-linked sodium polyacrylate identified as 2-propenoic acid, polymers with N, N-di-2
propenyl -2-propen -1-amine and hydrolyzed polyvinyl acetate, sodium salts, graft (CAS Rg.
nIT breaks open onion cells which free enzymes that produce
propenyl sulphuric acid.
PA ([(C[D.sub.3]).sub.2]S0, [.sup.[delta]ppm): 2.40-2.60 (solvent residual peak of [(C[D.sub.3]).sub.2]S0), 4.97-6.33 (C[H.sub.2]=CH-C[H.sub.2]-, propenyl protons), 8.10-9.15 (six protons of benzene ring in PA).
APEG ([(C[D.sub.3]).sub.2]S0, [.sup.[delta]ppm): 2.50 (solvent residual peak of [(C[D.sub.3]).sub.2]S0), 3.00-3.80 (-OC[H.sub.2]C[H.sub.2]-, ether groups), 3.80-6.00 (C[H.sub.2]=CH-C[H.sub.2]-, propenyl protons), 4.40-4.60 (-OH, active hydrogen in APEG).[Fig.
More work is needed to determine how derivative is formed, but it could be generated by dehydration of both sides of the propenyl group of allicin.
It is hypothesized that allicin is converted to its derivative, which is 2 atomic mass units smaller, by dehydration of both sides of the propenyl group of allicin during fermentation.
Among aromatics with allyl,
propenyl and/or methoxy side chains, safrole and asarone showed similar trypanocidal activity, safrole being a little bit more active than asarone.