10-[17-(tert-butyl-dimethyl-silanyloxy)-3,5,7-trimethoxy-4,8,14-trimethyl-11-oxo-10,23-dioxa-bicyclo[17.3.1]tricosa-12,14,20-trien-9-yl]-3-methoxy-2,4,8-trimethyl-5-oxo-9-triethylsilanyloxy-undecanal

3-(tert-butyl-dimethyl-silanyloxy)-11-[5-(2-hydroxy-4-methoxy-3,5-dimethyl-tetrahydro-pyran-2-yl)-1,3-dimethyl-2-triethylsilanyloxy-pentyl]-13,15,17-trimethoxy-6,12,16-trimethyl-10,23-dioxa-bicyclo[17.3.1]tricosa-5,7,21-trien-9-one