Three new pentacyclic triterpenes, identified as olean-11-one-13(18)-ene 1, urs-3-one 2 and 30-desmethyl-urs-3-on-20-ol 4 and one unknown alicyclic glycoside, 10-nonylcyclohex-12-ene-11-glucoside 7 have been isolated from the root bark of Mangifera indica cultivar Desi in addition to the known compounds β-sitosterol glycoside, mangiferin and isomangiferin. The structures of these phytoconstituents have been established on the basis of spectral data and chemical transformation.

pentacyclic triterpene, root bark, Mangifera indica, alicyclic glycoside

13C NMR data:
missing...
1H NMR data:
Linkage	Residue	H1	H2	H3	H4	H5	H6	H7	H8	H9	H10	H11	H12	H13	H14	H15	H16	H17	H18	H19	H20	H21	H22	H23	H24	H25	H26	H27	H28	H29
3	bDGlcp	4.98	4.47	4.19	4.19	4.87	3.66-3.95
	Subst	?	?	3.22	?	-	5.35	?	?	?	-	?	?	-	?	?	?	?	0.65	0.95	?	0.90	?	?	?	?	0.78	0.84	?	0.84

There is only one chemically distinct structure:

SVGMWSMILES3D molIonize

 

CC[C@H](CC[C@H](C)[C@@H]1CC[C@@H]2[C@@H]3CC=C4C[C@@H](O[C@@H]5O[C@H](CO)[C@@H](O)[C@H](O)[C@H]5O)CC[C@]4(C)[C@@H]3CC[C@]12C)C(C)C

576.859 g/mol (C₃₅H₆₀O₆)