2-Hydroxy-2-methyl-N-(3,3,3-trifluoro-propyl)-malonamic acid 、
(6R,7S)-7-amino-2-fluoro-6-methyl-9-(2,2,2-trifluoro-ethyl)-6,7-dihydro-9H-5-oxa-9-aza-benzocyclohepten-8-one 在
(−)-N-[(6R,7S)-2-fluoro-6-methyl-8-oxo-9-(2,2,2-trifluoro-ethyl)-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl] 作用下,
以to yield (−)-N-[(6R,7S)-2-fluoro-6-methyl-8-oxo-9-(2,2,2-trifluoro-ethyl)-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl]-2-(R or S)-hydroxy-2-methyl-N′-(3,3,3-trifluoro-propyl)-malonamide, entity A, MS m/e (%)的产率得到hydroxy-2-methyl-N'-(3,3,3-trifluoro-propyl)-malonamide