ethyl 6-[[1,7-bis[[6-ethoxycarbonyl-4-(2,4,6-trimethoxyphenyl)pyridin-2-yl]methyl]-9-(hexoxymethyl)-1,4,7-triazecan-4-yl]methyl]-4-(2,4,6-trimethoxyphenyl)pyridine-2-carboxylate;2-ethylpropane-1,3-diol;9-ethyl-1,4,7-tris[(2-nitrophenyl)sulfonyl]-1,4,7-triazecane;9-(hexoxymethyl)-1,4,7-tris[(2-nitrophenyl)sulfonyl]-1,4,7-triazecane;2-nitro-N-[2-[(2-nitrophenyl)sulfonyl-[2-[(2-nitrophenyl)sulfonylamino]ethyl]amino]ethyl]benzenesulfonamide