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National Institute of Standards and Technology
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, SRD 69
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Formulas which begin with C
4
O
4
-
All formulas are in Hill order.
C
4
O
4
-
(cyclobutanetetraone radical anion)
C
4
O
4
-
(C4O4-)
C
4
O
4
-2
(O2CCðCCO2 dianion)