4-Ethyl-6,7-dihydrodipyrido[1,2-
a
:2
'
,1
'
-
c
]pyrazinediium
(R
4
= C
2
H
5
)
Schmalzl, K.J.; Summers, L.A.
Aust. J. Chem. 30: 657-62 (1977)
E
= –420(mV), pH = 4.0-9.0
Pol., Br
–
salt.
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(R4 = C2H5)
(R4 = C2H5)