Isolation of a new monoterpenic ester from the leaves ofMichelia compressa(Maxim.) Sargent var.formosanaKanehira (Magnoliaceae)

Abstract

Pressafonin A (1) and pressafonin B (2), two new Michelia monoterpenic esters, have been isolated from Michelia compressa (Maxim.) Sargent var. formosana Kanehira (Magnoliaceae), and their structures are determined on the basis of spectroscopic analysis.

Biofunctional Constituents from Michelia compressa var. lanyuensis with Anti-Melanogenic Properties

“…In previous studies, the compounds from Michelia compressa var. formosana have been reported [2,6,7,8].…”

Sesquiterpenes and Monoterpenes from the Leaves and Stems of Illicium simonsii and Their Antibacterial Activity

“…Eight known compounds were identified as caryolane-1,9 β -diol ( 2 ), clovane-2 α ,9 β -diol ( 4 ) [ 10 ], pressafonin A ( 6 ), pressafonin B ( 7 ) [ 13 ], oplodiol ( 8 ) [ 14 ], ent-oplopanone ( 9 ) [ 15 ], abscisic acid ( 10 ) [ 16 ] and (3 S ,5 R ,6 S ,7 E )-3,5,6-trihydroxy-7-megastigmen-9-one ( 11 ) [ 17 ] by comparison of their NMR spectroscopic data with those reported in the literature ( Supporting Information ).…”

Anti-Covid-19 Activity Compounds from Michelia crassipes

“…Field observation in Changsha (China) indicated that its flowers started blooming in late March and continued into early May for about 50 days [ 2 ]. In the course of screening for biologically and chemically novel agents from Formosan Magnoliaceous plants [ 3 – 7 ], M. crassipes was chosen for further phytochemical investigation. The compounds derived from the stems include one oxoaporphine, liriodenine ( 1 ) [ 8 ]; four benzenoids, vanillic acid ( 2 ) [ 9 ], vanillin ( 3 ) [ 10 ], p -hydroxybenzoic acid ( 4 ) [ 10 ], and p -hydroxybenzaldehyde ( 5 ) [ 11 ]; two amides, N - trans -feruloyltyramine ( 6 ) [ 12 ] and N - cis -feruloyltyramine ( 7 ) [ 13 ]; one cyclitol, (–)-liriodendritol ( 8 ) [ 14 ].…”