p. 1249 - 1251
(1997)p. 4505 - 4506
(2007/10/03)p. 713 - 716
(2007/10/03)N-(4-Hydroxy-2,2-dimethyl-5-nitro-chroman-6-yl)-acetamide
N-(2,2-Dimethyl-5-nitro-4-oxo-chroman-6-yl)-acetamide
3-(2,2-dimethyl-5-nitro-2H-1-benzopyran-6-yl)acrylic acid
N-(2,2-Dimethyl-5-nitro-2H-chromen-6-yl)-acetamide
6-amino-2,2-dimethyl-5-nitro-2H-1-benzopyran