Abstract:
:Five undescribed compounds were separated from Abrus mollis leaves, including two truxillate forms (abrusamide D, H) and three truxinate forms (abrusamide E, F, G). The absolute configuration of abrusamide D was determined by X-ray crystallography. Abrusamide A was reassessed and corrected to be β-truxinate configuration rather than α-form. LC-MS/MS and CD spectroscopy were applied to determine and analyze ten compounds, including four truxillate forms (abrusamide B ~ D and H), four truxinate forms (abrusamide E ~ G and A), and two precursors [(E)-N-(4-hydroxycinnamoyl) tyrosine, (Z)-N-(4-hydroxycinnamoyl) tyrosine]. It showed that the fragmentation pattern of truxillate was symmetric, while that of truxinate was asymmetric and irregular. The CD Cotton effect was related to cyclobutane configuration. These findings provided strong evidence for the cyclobutane dimers to discriminate their configuration. In addition, the bioactivity assay showed that the compounds had low toxicity and anti-inflammatory effect.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Yuan X,Liu Y,Zhao H,Men L,He C,Qiu Y,Yu Q,Li K,Qi L,Chen Ddoi
10.1016/j.phytochem.2020.112572subject
Has Abstractpub_date
2021-01-01 00:00:00pages
112572eissn
0031-9422issn
1873-3700pii
S0031-9422(20)31187-0journal_volume
181pub_type
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