8-methoxy-6-nitro-5',7'-dimethoxy-3',3'-dimethyl-1'-n-hexylspiro(2H-1-benzothiopyran-2,2'-indoline) 、
8-chloro-6-nitro-5'-methoxy-1',3',3'-trimethylspiro(2H-1-benzothiopyran-2,2'-indoline) 生成 8-methoxy-6-nitro-1',3',3'-trimethylspiro(2H-1-benzothiopyran-2,2'-benz(f)indoline)