11-(tert-butyl-dimethyl-silanyloxy)-7-[1-(tert-butyl-dimethyl-silanyloxy)-3-(4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-18-methoxy-13-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-9,19-dien-3-yn-5-one

tert-butyl-[5-(6-[1,3]dioxolan-2-ylmethyl-3-methoxy-3,6-dihydro-2H-pyran-2-yl)-2-methylene-pentyloxy]-diphenyl-silane

tert-butyl-[5-(3-methoxy-6-prop-2-ynyl-3,6-dihydro-2H-pyran-2-yl)-2-methylene-pentyloxy]-diphenyl-silane

[3-(6-[1,3]dioxolan-2-ylmethyl-3-methoxy-3,6-dihydro-2H-pyran-2-yl)-prop-1-ynyl]-trimethyl-silane

2-(4-bromomethyl-pent-4-enyl)-3-methoxy-6-prop-2-ynyl-3,6-dihydro-2H-pyran