6,7-Dihydro-6-hydroxydipyrido[1,2-
a
:2
'
,1
'
-
c
]pyrazinediium
(R
6
= OH)
Black, A.L.; Summers, L.A.
J. Chem. Soc. C 610-1 (1969)
E
= –290(mV), pH = 1.8-4.0
Pol., Br
–
salt.
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