2 3
H2N-
l// %AJ_//
6 5
158.9
158.9
MX
149.4 140.0 142.0
128.5 Hz
JÍL
JU
IJ
i_u
165.9 153.7
131.5
-rr
115.5 113.1
ppm
—i-1—i—
58.4 47.7 50.0
—i-r-
8.7 0