The synthetic steroid RU-486 is shown below. How many pi bonds does RU-486 contain? 
Definitions:
Density
A physical property defined as the mass of a substance per unit volume, usually expressed in grams per cubic centimeter or kilograms per cubic meter.
Density
The mass per unit volume of a substance, indicating how much matter is packed into a particular space.
Volume
A measurement of the three-dimensional space occupied by an object or a substance.
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