[CH3:1][C@@:2]12[C:8]([CH3:10])([CH3:9])[C@@H:5]([CH2:6][CH2:7]1)[C:4](=O)[C:3]2=O.COP([CH2:19][C:20](=O)[CH2:21][C:22]([CH3:25])([CH3:24])[CH3:23])(=O)OC.O.[NH2:28][NH2:29]>>[CH3:23][C:22]([CH3:25])([CH3:24])[CH2:21][C:20]1[CH:19]=[C:4]2[C:3]([C@:2]3([CH3:1])[C:8]([CH3:10])([CH3:9])[C@H:5]2[CH2:6][CH2:7]3)=[N:29][N:28]=1light-yellow solid. MS (ESI): 258.9 (MH+). Prepared from (1S,4R)-1,7,7-trimethyl-bicyclo[2.2.1]heptane-2,3-dione, (4,4-dimethyl-2-oxo-pentyl)-phosphonic acid dimethyl ester, hydrazine monohydrate.
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