(S)-2-Ethynyl-2-methyl-1,4-dioxa-spiro[4.5]decane

[5R,8R,8aS]-(-)-8-methyl-5-(pent-4-ynyl)octahydroindolizine

(1'R,4R,6R)-4-[2-(tert-butyldiphenylsilanyloxy)-ethyl]-6-(1'-methylprop-2'-ynyl)-tetrahydropyran-2-one

(3E,5R,6R,7S,8R,9S)-8-(t-butyldimethylsilyloxy)-3,5,7,9-tetramethyl-6-trimethylsilyloxy-3-decen-1-yne

tert-butyl-[(1R,2R)-1-cyclopent-3-enyl-2-methylbut-3-ynyloxy]-dimethylsilane