What is the structure of the following alkyne? 4‐ethyl‐4‐methyl-2-hexyne

Structural formula of 4-ethyl-4-methyl-2-hexyne showing carbon and hydrogen atoms.

Structural formula of 4-ethyl-4-methyl-2-hexyne with carbon and hydrogen atoms labeled.

Detailed structural formula of 4-ethyl-4-methyl-2-hexyne with carbon and hydrogen atoms.

Structural formula of 4-ethyl-4-methyl-2-hexyne with a terminal alkyne group.