N-<6-<4-hydroxy-6-methyl-5-methylsulfanyl-2-(2-nitrobenzyloxy)-5-vinyltetrahydropyran-3-yloxy>-4-methoxytetrahydropyran-3-yl>-N-isopropylcarbamic acid 9H-fluoren-9-ylmethyl ester

benzoic acid 5-<5-<(9H-fluoren-9-ylmethoxycarbonyl)isopropylamino>-4-methoxytetrahydropyran-2-yloxy>-2-methyl-3-methylsulfanyl-6-(2-nitrobenzyloxy)-3-vinyltetrahydropyran-4-yl ester

N-isopropyl-N-<4-metoxy-6-<6-methyl-5-methylsulfanyl-2-(2-nitrobenzyloxy)-4-(triethylsilyloxy)-5-vinyltetrahydropyran-3-yloxy>tetrahydropyran-3-yl>carbamic acid 9H-fluoren-9-ylmethyl ester