6. What is the major product of the following reaction? (3%)
N
H
H3C
H3C
+ CH3SH
H+
?
H3CS
H
N
CH3
CH3 N
H
H3C
H3C
SCH3
N
SCH3
H3C
H3C
H3N
CH3
CH3
SCH3
H3N
SCH3
H3C CH3
I II III
IV
V
(A) I
(B) II
(C) III
(D) IV
(E) V

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