156206-15-4 1,6,7,8-Indolizinetetrol, octahydro-, 6-methanesulfonate, 1S-(1.alpha.,6.beta.,7.alpha.,8.beta.,8a.beta.)- 320779-48-4 1,6,7,8-Indolizinetetrol, octahydro-, 1,7,8-triacetate 6-benzoate, (1S,6S,7R,8R,8aR)- 156205-42-4 1,6,7,8-Indolizinetetrol, octahydro-, 1,7,8-triacetate, 1S-(1.alpha.,6.beta.,7.alpha.,8.beta.,8a.beta.)- 156150-92-4 1,6,7,8-Indolizinetetrol, octahydro-, 1,6,8-triacetate, 1S-(1.alpha.,6.beta.,7.alpha.,8.beta.,8a.beta.)-