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Verbascoside derivatives and iridoid glycosides from Penstemon crandallii
L D Ismail1, M M el-Azizi, T I Khalifa
1Department of Pharmacognosy, Al-Azhar University, Nasr City, Cairo, Egypt.
Phytochemistry
|August 1, 1995
Abstract:
The new phenylethanoid glycosides 2-O-acetyl-3'''-O-methylverbascoside and 2,4"-di-O-acetyl-3'''-O-methylverbascoside were isolated and identified from Penstemon crandallii. The major iridoid glycoside was plantarenaloside and no aucubin type iridoids were found. This contrasted with a previous analysis of P. teucrioides, from the same Penstemon subsection, which was dominated by aucubin derivatives.