What is the name of the following structure? 
Definitions:
Chiral
Describes a molecule that cannot be superimposed on its mirror image, often resulting in different biological activities for each form.
Achiral
Lacking chirality; not having a non-superimposable mirror image.
Asymmetric Carbon
An asymmetric carbon, also known as a chiral carbon, is a carbon atom that is attached to four different groups, making its mirror image not superimposable on itself.
R or S
A system for specifying the configuration of chiral centers in molecules, based on the CIP (Cahn-Ingold-Prelog) priority rules.
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