<svg xmlns="http://www.w3.org/2000/svg" xmlns:wrs="http://www.wiris.com/xml/mathml-extension" height="25" width="213" wrs:baseline="16"><!--MathML: <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>N</mi><mn>2</mn></msub><mi>O</mi><mo>,</mo><mi>N</mi><mi>O</mi><mo>,</mo><msub><mi>N</mi><mn>2</mn></msub><mo>&#xA0;</mo><msub><mi>O</mi><mn>3</mn></msub><mo>,</mo><msub><mi>N</mi><mn>2</mn></msub><mo>,</mo><msub><mi>O</mi><mn>4</mn></msub><mo>,</mo><msub><mi>N</mi><mn>2</mn></msub><mo>,</mo><msub><mi>O</mi><mn>5</mn></msub></math>--><defs><style type="text/css">@font-face{font-family:'math1f7177163c833dff4b38fc8d287';src:url(data:font/truetype;charset=utf-8;base64,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)format('truetype');font-weight:normal;font-style:normal;}</style></defs><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="6.5" y="16">N</text><text font-family="Arial" font-size="12" text-anchor="middle" x="16.5" y="21">2</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="26.5" y="16">O</text><text font-family="math1f7177163c833dff4b38fc8d287" font-size="16" text-anchor="middle" x="35.5" y="16">,</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="44.5" y="16">N</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="56.5" y="16">O</text><text font-family="math1f7177163c833dff4b38fc8d287" font-size="16" text-anchor="middle" x="65.5" y="16">,</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="74.5" y="16">N</text><text font-family="Arial" font-size="12" text-anchor="middle" x="84.5" y="21">2</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="98.5" y="16">O</text><text font-family="Arial" font-size="12" text-anchor="middle" x="108.5" y="21">3</text><text font-family="math1f7177163c833dff4b38fc8d287" font-size="16" text-anchor="middle" x="114.5" y="16">,</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="123.5" y="16">N</text><text font-family="Arial" font-size="12" text-anchor="middle" x="133.5" y="21">2</text><text font-family="math1f7177163c833dff4b38fc8d287" font-size="16" text-anchor="middle" x="139.5" y="16">,</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="148.5" y="16">O</text><text font-family="Arial" font-size="12" text-anchor="middle" x="158.5" y="21">4</text><text font-family="math1f7177163c833dff4b38fc8d287" font-size="16" text-anchor="middle" x="164.5" y="16">,</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="173.5" y="16">N</text><text font-family="Arial" font-size="12" text-anchor="middle" x="183.5" y="21">2</text><text font-family="math1f7177163c833dff4b38fc8d287" font-size="16" text-anchor="middle" x="189.5" y="16">,</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="198.5" y="16">O</text><text font-family="Arial" font-size="12" text-anchor="middle" x="208.5" y="21">5</text></svg>