How could you distinguish the two compounds below using 1H and proton decoupled 13C NMR? 
Definitions:
Complements
Goods or services that are used together, where an increase in demand for one leads to an increase in demand for the other.
Quantity Supplied
The total number of goods or services that manufacturers are ready and can provide on the market at a particular price level.
Quantity Supplied
The amount of a good or service that producers are willing and able to sell at a given price over a specific period.
Supply Curve
A visual depiction showing the link between a product or service's price and the amount of it a supplier is prepared and capable of offering for sale.
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