ABSTRACT
Four new benzoyltyramines, atalantums H-K (1-4) and seven known compounds were isolated from the peels of Atalantia monophylla. All compounds were tested for cytotoxicity against HeLa, HCT116 and MCF-7 cell lines, as well as normal cells (Vero cells). Compound 5 showed cytotoxicity against HeLa, HCT116 and MCF-7 cell lines with IC50 values ranging from 16-25 µg/mL but was inactive against Vero cells. Compound 6 also showed interesting results as compound 5 with IC50 values ranging from 15-18 µg/mL and an IC50 value of 80.20 µg/mL against Vero cells. This means compounds 5 and 6 can be used as lead compounds for anticancer agents.
Subject(s)
Antineoplastic Agents/isolation & purification , Rutaceae/chemistry , Animals , Antineoplastic Agents/chemistry , Antineoplastic Agents/pharmacology , Cell Line , Chlorocebus aethiops , Humans , Inhibitory Concentration 50ABSTRACT
Four new dimeric styrenes, 1-4, were isolated from an EtOAc crude extract of the seeds of Atalantia monophylla. The biosynthetic pathway of 1 is proposed to involve a [2 + 2] cycloaddition, while 2-4 may be generated via a polar mechanism with a carbocation as the key intermediate. The structures of 1-4 were defined from spectroscopic analysis; experimental and calculated ECD spectra were used to characterize their absolute configurations. When tested against two different cancer cell lines, 1-4 were not determined to be cytotoxic (IC50 > 10 µM).
Subject(s)
Rutaceae/embryology , Seeds/chemistry , Styrenes/isolation & purification , Cell Line, Tumor , Drug Screening Assays, Antitumor , Humans , Rutaceae/chemistry , Styrenes/pharmacologyABSTRACT
Three new limonoids, limonophyllines A-C (1, 4 and 5), along with two known limonoids (2 and 3) and 11 acridone alkaloids (6-16) were isolated from the stems of Atalantia monophylla. All isolates were evaluated against cholangiocarcinoma, KKU-M156, and HepG2 cancer cell lines. Compounds 12, 14 and 16 displayed cytotoxicity against KKU-M156 cell line with IC50 ranging from 3.39 to 4.1 µg/mL while cytotoxicity against HepG2 cell line with IC50 ranging from 1.43 to 8.4 µg/mL. The structures of all isolated compounds were established by spectroscopic methods including 1D and 2D NMR, IR and mass spectrometry.
