1-(2,4-Dimethoxy-benzyl)-3-[(2E,4E)-(S)-1-hydroxy-4-methyl-6-((3aR,5S,6S,6aR)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-hepta-2,4-dien-(Z)-ylidene]-pyrrolidine-2,4-dione

(2E,4E)-(S)-4-Methyl-6-((3aR,5S,6S,6aR)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-hepta-2,4-dienoic acid

(2E,4E)-(S)-4-Methyl-6-((3aR,5S,6S,6aR)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-hepta-2,4-dienoyl chloride

{(2,4-Dimethoxy-benzyl)-[(4E,6E)-(S)-6-methyl-3-oxo-8-((3aR,5S,6S,6aR)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-nona-4,6-dienoyl]-amino}-acetic acid ethyl ester