2RS-acetoxytridec-12-en-9-yne

12,12-ethylenedioxytridec-1-en-4-yne

11-ethoxycarbonyl-12-oxotridec-1-en-4-yne

oct-7-en-1-yl 4-methylbenzenesulfonate

7-oxooctyl 4-methylbenzenesulfonate