Enantiomeric N-acetyldopamine trimers from Cicadae Periostracum and their absolute configurations.
Phytochemistry
; 213: 113780, 2023 Sep.
Article
em En
| MEDLINE
| ID: mdl-37379971
ABSTRACT
Six previously undescribed N-acetyldopamine (NADA) trimmer racemates, percicamides A-F (1-6), were isolated from a 70% ethanol extract of Cicadae Periostracum. Subsequent chiral-phase separation afforded six pairs of enantiomers, (+)- and (-)-percicamides A-F (1a/1b-6a/6b). Their structures including absolute configurations were elucidated by combined extensive spectroscopic data and quantum chemical calculations. Compounds 1-6 represent the first examples of NADA trimmers with a cis-relationship of H-7'/H-8' or H-7''/H-8''. Bioassays verified that all isolated compounds showed weak inhibitory effects on nitric oxide production in RAW 264.7 cells.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Medicamentos de Ervas Chinesas
Idioma:
En
Revista:
Phytochemistry
Ano de publicação:
2023
Tipo de documento:
Article