Four pairs of stereoisomeric indole alkaloids, (±)-baphicacanthcusines A-D (), and one new indole alkaloid, baphicacanthcusine E (), together with nine known compounds were identified from the leaves of . (±)- and - possess an unprecedented skeleton in which two indole moieties are bridged by a phenylpropane unit. (±)- represents the first natural dispiro-oxazolidinone bisoxindoles.
View Article and Find Full Text PDFNine new alkylresorcinols, designated as embelialkylresorcinols A-I (1-9), along with five known compounds (10-14) were isolated from the fruits of Embelia ribes. Their structures were elucidated by extensive spectroscopic analysis (1D, 2D NMR and HRESIMS), optical rotation data and modified Mosher method. Notably, embelialkylresorcinols A-H (1-8), possessing double aromatic rings linked with an aliphatic chain, are reported from the genus of Embelia (Myrsinaceae) for the first time.
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