Respuesta :
The structure of 2-Sec-butyl-4,4-diethylnonanoic acid is attached below,
The structure was drawn using following information.
1) First, the parent chain was identified, as the parent name is specified at the end of the name, so it was found to be nonanoic acid. The nonane specifies the number of nine carbon atoms and -ic acid specifies that the parent compound is carboxylic acid with nine carbons.
2) Secondly, the substituents were added as follow,
a) At alpha position (2nd carbon next to carbonyl carbon) a sec-butyl group was added.
b) At carbon 4, two ethyl groups were added, as the number 4,4 shows double substitution of same substituent.

Explanation:
The main carbon chain of this molecule will have nine carbon atoms with ninth carbon atom bonded to two oxygen atom.Along with:
- 2-methyl propyl is present on the second carbon atom from the side of carboxylic group.
- Two ethyl groups attached to 4 carbon atom from the side of carboxylic acid.
The structure of carboxylic acid is given is an image.
