The synthetic steroid RU-486 is shown below. How many pi bonds does RU-486 contain? 
Definitions:
Track Values
The process or feature of monitoring and recording changes in variables or parameters over time.
Bar Chart
A graphical representation of data using bars of different heights or lengths to compare various categories.
Column Chart
A visual representation of data, where individual columns represent different values in a dataset, often used in statistics and analytics.
Line Chart
This chart variety shows data by plotting 'markers' on the graph, which are then joined by direct line segments.
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