[EN] NEW 3-DECLADINOSYL 9a-N-CARBAMOYL AND 9a-N-THIOCARBAMOYL DERIVATIVES OF 9-DEOX-9-DIHYDRO-9a-AZA-9A-HOMOERYTHROMYCIN A [FR] DERIVES DE 3-DECLADINOSYLE DE LA 9A-N-CARBAMOYL- ET DE LA 9A-N-THIOCARBAMOYL-9-DESOXO-9-DIHYDRO-9A-AZA-9A-HOMOERYTHROMYCINE A