Consider the following sequence of reactions to produce major product (A).
Molar mass of product (A) is ________ \( \text{g mol}^{-1} \).
(Given molar mass in \( \text{g mol}^{-1} \) of C : \( 12 \), H : \( 1 \), O : \( 16 \), Br : \( 80 \), N : \( 14 \), P : \( 31 \))
