A sesquiterpene evoninoate alkaloid from Maytenus guianensis

Dihydroagarofuran Sesquiterpene Alkaloids from Maytenus putterlickoides

“…From these data, 1 was determined to be mayteine, previously isolated from M. guianensis and M. krukovii. 6,8 The identification was confirmed by comparison to an authentic sample.Putterine A (2) (7 -nicotinoyl-7-deacetyleuonymine) was shown to have the molecular formula C 42 H 48 N 2 O 18 by analysis of the FAB mass spectrum (parent ion at m/z 869.2996 (M + + H)). The 1 H NMR spectrum showed the presence of five acetyl groups (δ 1.84, 1.99, 2.09, 2.16, and 2.23) and one nicotinoyl ester moiety (δ 7.46 (dd), 8.40 (ddd), 8.85 (dd), and 9.36 (d)).…”

“…The 1 H NMR spectrum showed the presence of five acetyl groups (δ 1.84, 1.99, 2.09, 2.16, and 2.23) and one nicotinoyl ester moiety (δ 7.46 (dd), 8.40 (ddd), 8.85 (dd), and 9.36 (d)). There were also resonances for two methyl groups on quaternary carbons, two oxymethylene groups, and seven methine protons, all of which could be attributed to a dihydroagarofuran nucleus.…”

Chemical constituents of Salacia elliptica (Celastraceae)

“…90-98 was identified as β-sistosterol (7) (15.0 mg). 34 The dry residue resulted from Fr. 99-106 was submitted to CC furnishing two main groups of fractions (Fr.45-52 and Fr.…”

“…45-52 (900.0 mg) was submitted to CC and the subfraction 102-105 (205.6 mg) was purified by preparative TLC (eluted with CHCl 3 ), furnishing the triterpene 3,4-seco-friedelan-3-oic acid (8) (18.1 mg). 9,34 And the second group, Fr. 77-128, furnished palmitic acid (9) (28.6 mg).…”

“…37 The constituent mangiferin (13) (32.4 mg) 12,26 was isolated in high pureness degree from Fr. 145-150, and the polyol galactitol or dulcitol (14) (313.2 mg), 7,34,38 from Fr. 169-170.…”