(1-hydroxy-2,2-dimethyldec-3-yn-5-yl) methyl carbonate

5-(4-methoxybenzyloxy)-4,4-dimethyl-1-phenyl-3-pentyn-1-ol

5-(4-methoxyphenoxycarbonyloxy)-2,2-dimethyl-3-pentyn-1-ol

1-methoxycarbonyloxy-4,4-dimethyl-1-phenyl-2-pentyn-1-ol

1-methoxycarbonyloxy-5-(4-methoxybenzyloxy)-4,4-dimethyl-2-pentyne