N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
124
4 13 C NMR
N
H 3 C
CH 3
HN
CH 3
N
H 3 C
CH 3
HN
CH 3
N
N
H 3 C
CH 3
CH 3
CH 3
H
N
N
H
H 3 C
CH 3
N CH 3
CH 3
N CH 3
CH 3
N CH 3
CH 3
N CH 3
CH 3
H
N CH 3
H
N CH 3
H
N CH 3
H
N CH 3
N
NH 2
NH 2
NH 2
NH 2
HN
45.9
(-0.4)
53.6
(+0.5)
51.2
(-3.0;
-2.7*)
57.2
(-2.6;
-2.3*)
36.6
(-1.3;
-0.5*)
46.1
(-1.0;
-0.2*)
* doubly protonated form
* doubly protonated form
54.0
(-2.1)
61.8
(-1.6)
12.5
(-0.9)
11.9
(-0.8)
14.3
(-2.6)
12.8
(-2.1)
23.2
(-2.9)
20.6
(-2.0)
22.5
(-3.1)
18.7
(-1.3)
28.2
(-1.2)
25.4
(-0.8)
50.5
(+1.9)
55.5
(+3.8)
50.4
(+6.6)
53.6
(+8.9)
35.2
(-1.8)
44.6
(-1.3)
36.1
(-2.0)
45.2
(-1.2)
33.9
(-2.5)
40.9
(-0.8)
28.5
(-2.7)
38.7
(+0.2)
139.9
122.9
118.0
126.5
118.5
116.9
117.0
129.4
129.4
128.3
129.3
129.3
129.4
141.6
143.2
143.4
146.7
149.9
151.0
121.5
117.9
127.1
115.1
112.3
113.1
46.3
44.8
30.2
39.9
113.6
26.3 (-1.1)
26.8 (-0.7)
26.9 (-1.2)
25.8 (-1.0)
25.7 (-0.3)
26.5 (-0.9)
37.6 (-5.4)
32.7 (-2.7)
29.2 (-1.6)
33.5 (-1.5)
41.1 (-0.7)
51.1 (+0.7)
58.7 (+0.6)
64.3 (+2.4)