(2S,3R,4S)-N'-benzyl-N''-cyano-N-(3,4-dihydro-2-dimethoxymethyl-3-hydroxy-2-methyl-6-nitro-2H-benzopyran-4-yl)guanidine

(2S,3S,4R)-N''-cyano-N-(6-nitro-3,4-dihydro-3-hydroxy-2-methyl-2-([1,3]dioxolan-2-yl)-2H-benzopyran-4-yl)-N'-benzylguanidine

(2S,3S,4R)-4-[[(cyanoimino)phenoxymethyl]amino]-6-nitro-3,4-dihydro-3-hydroxy-2-methyl-2-([1,3]-5,5-dimethyldioxan-2-yl)-2H-1-benzopyran

(2S,3S,4R)-N''-cyano-N-(6-nitro-3,4-dihydro-3-hydroxy-2-methyl-2-dimethoxymethyl-2H-benzopyran-4-yl)-N'-(4-methoxybenzyl)guanidine

(2S,3S,4R)-N''-cyano-N-(6-nitro-3,4-dihydro-3-hydroxy-2-methyl-2-([1,3]-5,5-dimethyldioxan-2-yl)-2H-benzopyran-4-yl)-N'-benzylguanidine