19. Identify the mechanistic pathways, respectively, for the products in the following reaction.
6166482d3bfc4.jpg
(A)6166484daa14e.jpg
(B)61664854dc746.jpg
(C)6166485c1b112.jpg
(D)61664861ada05.jpg

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統計： A(1), B(0), C(0), D(0), E(0) #2788988