该化合物【图片】按系统命名法2017中的建议的主链及编号选择中正确的是:( )
A.
6-氰基-1-二甲胺基-5-甲基-4-硝基-己-2-酮 6-cyano-1-dimethylamino-5-methyl-4-nitrohex-2-one
B.
5-甲基-1-二甲胺基-6-氰基-4-硝基己-2-酮 5-methyl -1-dimethylamino-6-cyano-4-nitrohex-2-one
C.
7-二甲氨基-3-甲基-4-硝基-6-氧亚基腈 7-(dimethylamino)-3-methyl-4-nitro-6-oxoheptanenitrile
D.
3-甲基-7-二甲氨基-4-硝基-6-氧亚基腈 3-methyl-7-(dimethylamino)- 4-nitro-6-oxoheptanenitrile