(2-endo,3-exo,4-endo)-8-Azabicyclo(3.2.1)octane-1,2,3,4-tetrol 1,2,3,4-Tetrahydroxy-nor-tropane 127414-85-1 8-Azabicyclo(3.2.1)octane-1,2,3,4-tetrol, (2-endo,3-exo,4-endo)- Calystegine B(2) Calystegine B(3) Calystegine B(4) Calystegine B2