Provide the reagents necessary to carry out the following conversion. 
Definitions:
Hydrophobic
Describing molecules or parts of molecules that repel water, often nonpolar substances that do not mix well with water.
Hydrophilic
Describes molecules or substances that are attracted to water and can be dissolved in it, typically because of the presence of polar groups.
Phospholipids
A class of lipids that are a major component of all cell membranes, consisting of two fatty acids, a glycerol unit, and a phosphate group, playing key roles in cellular structures and functions.
Choline
An essential nutrient that is part of the B-complex vitamin family; it's crucial for liver function, brain development, muscle movement, and metabolism.
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