Is The Reaction Different Between Darvacet And Percocet Give The Structure Of The Reaction Between Leucine And Serine In Two Different Ways.?

Give the structure of the reaction between leucine and serine in two different ways.? - is the reaction different between darvacet and percocet

Leu and Ser-first

(i-Pr-CH2)-CH (NH2)-CONH-CH (CH2)-COOH

Be Leu seconds --

HOCH 2-CH (NH2)-CONH-CH (CH2-i-Pr) COOH

i-Pr = isopropyl or 2-propyl = (CH3) 2-CH --