Abstract Carbon-13NMR has been used to detect the position of angular methyl oxygenation and determine the structure of 21α,26-dihydroxy-D:A-friedooleanan-3-one, a new trioxygenated friedooleanane from Salacia reticulata var. diandra and the assignment has been confirmed chemically.
Abstract The structural elucidation of two new triterpenoids, 3α,21β-diacetoxy-D:A-friedo-oleanane and 21α-acetoxy-D:A-friedo-oleanan-3 β-ol, and the known cycloart-25-ene-3β, 24-diol fromEuphorbiatortilis by spectral and chemical methods is described.