Heliosupine

Cynoglossophine

2-Methyl-2-butenoic acid 7-[[2,3-dihydroxy-2-(1-hydroxyethyl)-3-methyl-1-oxobutoxy)methyl-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl

2-Methyl-2-butenoic acid 7-[[2,3-dihydroxy-2-(1-hydroxyethyl)-3-methylbutyryloxy]methyl]-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl ester

2-Methyl-2-butenoic acid 7-[[2,3-dihydroxy-2-(1-hydroxyethyl)-3-methyl-1-oxobutoxy]methyl]-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl ester