methyl 3-cyanomethyl-1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)pyrazole-4-carboxylate
methyl 3-cyanomethyl-1-(2-deoxy-3,5-di-O-p-toluoyl-β-D-erythro-pentofuranosyl)pyrazole-4-carboxylate
methyl 5-cyanomethyl-1-(2-deoxy-3,5-di-O-p-toluoyl-β-D-erythro-pentofuranosyl)pyrazole-4-carboxylate