(1S)-(1α,2α,8β,8aβ)-1-acetoxy-2,8-bis<(2,2-dimethylpropanoyl)oxy>hexahydro-3(2H)-indolizinethione

(3S,4S,5RS)-3,4-diacetoxy-1-(5-(trimethylsilyl)-4-pentynyl)-5-(phenylthio)-2-pyrrolidinone

(1R)-(1β,2α,8Z,8aβ)-1,2-diacetoxy-8-((trimethylsilyl)methylene)hexahydro-3(2H)-indolizinone

(1R)-(1β,2α,8E,8aβ)-1,2-diacetoxy-8-(phenylmethylene)hexahydro-3(2H)-indolizinone

(1S)-(1α,2α,8β,8aβ)-1-acetoxy-2,8-bis((2,2-dimethylpropanoyl)oxy)hexahydro-3(2H)-indolizinone