How many chiral centers are there in the following molecule (the naturally occurring stereoisomer is the male hormone testosterone) ? 
Definitions:
Instructions
Instructions are commands given to a computer program to perform specific operations, serving as the basic units of execution.
Executable Programs
Computer programs that are in a format ready to be run or executed by the computer.
Binary Numbers
Base-2 numeral system numbers, using only two symbols (typically 0 and 1), fundamental in digital electronics and computing.
Machine Language
The lowest-level programming language, consisting of binary code that the computer's processor can directly execute.
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