(2R,4aR,8aS)-4a-methyl-2-trityloxyoctahydrochromen-5-N'-(2,4,6-triisopropylbenzenesulfono)hydrazone
(2S,4aR,8aS)-2-hydroxy-4a-methyloctahydrochromen-5-N'-(2,4,6-triisopropylbenzenesulfono)hydrazone
(4aR,8aS)-4a-methylhexahydrochromene-2-one-5-N'-(2,4,6-triisopropylbenzenesulfono)hydrazone