A new triterpene of Miconia macrothyrsa leaves: 28-carboxy-3-oxoolean-12-en-21α-yl acetate

@inproceedings{Diniz2006ANT,
  title={A new triterpene of Miconia macrothyrsa leaves: 28-carboxy-3-oxoolean-12-en-21α-yl acetate},
  author={Renata Diniz and Maria Coletta Vidigal and D{\'e}lio S. Raslan and Nelson G. Fernandes},
  year={2006}
}
The title compound, C32H48O5, isolated from the leaves of Miconia macrothyrsa, is a penta­cyclic triterpene, in which rings A, B, D and E take a chair conformation, while ring C has a half-chair conformation. Rings A and B and rings B and C are trans-fused, while rings D and E are cis-fused. In the crystal structure, there are inter­molecular O—H⋯O hydrogen bonds and intra­molecular C—H⋯O hydrogen bonds.