New manglanostenoic acids from the stem bark of Mangifera indica var. “Fazli”

Phytochemical investigation of the ethanolic extract of stem bark of Mangifera indica variety “Fazli” yielded four new lanostene-type triterpenic acids characterised as 3-oxo-lanost-cis-1,24-diene-27-oic acid (2), 3-oxo-lanost-cis-1,5,8,20(22)-tetra-ene-27-oic acid (3), 3-oxo-lanost-1,7,20(22)-triene-13,14-seco-27-oic acid (4) and 3-oxo-lanosta-cis-1,5,24-trien-27-oic acid (5) along with the known compound 3-oxo-lanost-cis-1,20(22)-diene-27-oic acid (1). The structures of these phytoconstituents have been elucidated on the basis of spectral analysis and chemical reactions.