For the transformation of norepinephrine to epinephrine (adrenaline) ,what is the likely mechanism? 
Definitions:
Necessary
In legal and ethical contexts, necessary refers to something that is required or indispensable to achieve a specific outcome or obligation.
Disaffirm
The legal act of renouncing or rejecting a contract or agreement, especially by a party who was not legally competent to enter it at the time of agreement.
Reasonable Value
The fair or market value of goods or services, as determined by considering the costs, demand, and any other factor relevant to an exchange.
Necessary
In legal and philosophical terms, necessary refers to something required, indispensable, or absolutely needed to achieve a certain outcome or fulfill a condition.
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