(C5H5N5) 2•0.5H2SO4
(C5H5N5) 2•H2SO4•2H2O
C5H5N5 • HCl
C5H5N5 • HCl·xH2O
C5H8N5O4P
C5H5N5O•HCl
C5H4N4
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