(5
3R,7
S)-1
6,2
6-dimethoxy-(5
3rH,5
4at,5
8cH)-5-hexahydro-1,2(1,3)-dibenzena-5(3,8)-pyrido[1,2-
c][1,3]oxazina-cyclononaphan-7-ol 在
吡啶 、
chromium(VI) oxide 作用下,
生成
(53R)-16,26-dimethoxy-(53rH,54at,58cH)-5-hexahydro-1,2(1,3)-dibenzena-5(3,8)-pyrido[1,2-c][1,3]oxazina-cyclononaphan-7-one