| abstract |
Compound of formula (I) wherein X = O or group = N-OH, R represents a group selected from A = hydrogen or together with B a carbon-carbon bond carbon, B = hydrogen, hydroxy or together with a carbon-carbon bond carbon, C, D, E, F = hydrogen or together with a carbon-carbon bond carbon, or one of its addition salts with pharmaceutically acceptable acids acceptable, with the exception of a few compounds, as a drug, application especially as neuroprotectors, new compounds of formula (I) and pharmaceutical compositions. |