| abstract |
COMPOUNDS USEFUL IN PARTICULAR AS AN ANTIBIOTIC, OF THE FORMULA: (CF DRAWING IN BOPI) IN WHICH A IS A -CH-CH-, -CHCH- OR-CH-CH-, R IS A HYDROGEN ATOM OR A GROUP R IS A HYDROGEN ATOM OR A LOWER ALKANOYL GROUP, R IS A HYDROGEN ATOM OR A GROUP (CF DRAWING IN BOPI) R IS A HYDROGEN ATOM OR A C-ALKANOYL GROUP AND R IS A HYDROGEN ATOM OR A GROUP ALKANOYL IN C AND WHEN R IS NOT A HYDROGEN ATOM, THEN R IS NOT A HYDROGEN ATOM; OR A SALT OF SUCH COMPOUND. |