Spontaneous resolution and crystal structure of (2S)-2-(3-nitro-phen-yl)-3-phenyl-2,3,5,6-tetra-hydro-4H-1,3-thia-zin-4-one; crystal structure of rac-2-(4-nitro-phen-yl)-3-phenyl-2,3,5,6-tetra-hydro-4H-1,3-thia-zin-4-one

(2S)-2-(3-硝基苯基)-3-苯基-2,3,5,6-四氢-4H-1,3-噻嗪-4-酮的自发拆分和晶体结构；外消旋-2-(4-硝基苯基)-3-苯基-2,3,5,6-四氢-4H-1,3-噻嗪-4-酮的晶体结构