${\displaystyle {\ce {H-C{\equiv }{\overset {\oplus }{N}}-{\overset {\ominus }{O}}<->H-{\overset {\oplus }{C}}=N-{\overset {\ominus }{O}}}}}$

In your article, replace the image with:

<chem>H-C{\equiv}\overset{\oplus}N-\overset{\ominus}O <-> H-\overset{\oplus}C=N-\overset{\ominus}O</chem>

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