Steroids and polyketides from Uvaria hamiltonii stem bark.

  title={Steroids and polyketides from Uvaria hamiltonii stem bark.},
  author={Kamrun Nahar Asha and Rasheduzzaman Chowdhury and Choudhury Mahmood Hasan and Mohammad Abdur Rashid},
  journal={Acta pharmaceutica},
  volume={54 1},
Two known steroids, stigmasterol and 6b-hydroxystigmasta-4,22-dien-3-one (1) and two unusual polyketides, cis-4-hydroxymellein (2) and trans-4-hydroxymellein (3) were isolated from the stem bark of Uvaria hamiltonii. The structures of the compounds were elucidated independently by high-resolution 2D-NMR techniques and confirmed by comparison with previously reported values.