Provide the structure of the major product which results from 1,2-addition of HBr to the diene shown below. 
Definitions:
Parathyroid Hormone
A hormone released by the parathyroid glands important for maintaining a stable level of calcium in the blood.
Insulin
A hormone produced by the pancreas that regulates the amount of glucose in the blood.
Neurosecretory Cell
Specialized neuron that secretes a hormone into the blood in response to an action potential.
Action Potential
A temporary reversal of an electric membrane potential, allowing for signal conduction in neurons.
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