(1R,2S,8aR)-

3-Oxo-(-)-lentiginosine

(1R,2S,8aR)-Hexahydro-1,2-dihydroxy-3(2H)-indolizinone

[1R-(1a,2,8aa)]-Hexahydro-1,2-dihydroxy-3(2H)-indolizinone