2,2-Dimethyl-propionic acid 2-((4aS,5S,7S,8aR)-7-benzyloxymethyl-2,2,4a-trimethyl-tetrahydro-pyrano[4,3-d][1,3]dioxin-5-yl)-ethyl ester

(4E,6E,14Z,16E,19E)-(1R,9R,11R,12R,13S,21S,23S,24S)-11-(tert-Butyl-dimethyl-silanyloxy)-24-(tert-butyl-dimethyl-silanyloxymethyl)-23-(2-hydroxy-ethyl)-12,15,24-trimethyl-2,22,26-trioxa-tricyclo[19.3.1.19,13]hexacosa-4,6,14,16,19-pentaen-3-one

2,2-Dimethyl-propionic acid 2-{(4aS,5S,7S,8aR)-7-[(E)-4-(benzothiazole-2-sulfonyl)-but-1-enyl]-2,2,4a-trimethyl-tetrahydro-pyrano[4,3-d][1,3]dioxin-5-yl}-ethyl ester