(1R,2S,6R,8R,10R,11S)-11-isopropyl-10-methoxy-6-methyl-5-methylene-9-oxatricyclo[6.2.1.02,6]undecan-7-one

(1S,2S,6R,8R,11S)-11-isopropyl-6-methyl-5-methylene-9-oxatricyclo[6.2.1.02,6]undecan-7,10-dione

(1S,2S,5R,7R,8S)-3-Iodo-8-isopropyl-7-methoxy-3-methyl-2-(4-trimethylsilanyl-but-3-ynyl)-6-oxa-bicyclo[3.2.1]octan-4-one

(1R,2S,5S,6R,7R,8R,11S)-5-Azidomethyl-7-hydroxy-11-isopropyl-6-methyl-9-oxa-tricyclo[6.2.1.02,6]undecan-10-one