7-benzyloxy-7-methyl-3,5-octadiyn-2-one

2-(3-Benzyloxy-3-methyl-but-1-ynyl)-2-hydroxy-succinic acid 1-tert-butyl ester 4-ethyl ester

(Z)-6-benzyloxy-3-n-butyl-1,1,1-trifluoro-6-methyl-2-hepten-4-yne