ruby-annotated SMILES

example of using HTML ruby to annotate atom indices in a SMILES string for theobromine.

HTML

<h2>
theobromine
</h2>
<ruby>C<rt>1</rt></ruby><ruby>n<rt>2</rt></ruby>1<ruby>c<rt>3</rt></ruby><ruby>n<rt>4</rt></ruby><ruby>c<rt>5</rt></ruby>2<ruby>c<rt>6</rt></ruby>1<ruby>c<rt>7</rt></ruby>(=<ruby>O<rt>8</rt></ruby>)<ruby>[nH]<rt>9</rt></ruby><ruby>c<rt>10</rt></ruby>(=<ruby>O<rt>11</rt></ruby>)<ruby>n<rt>12</rt></ruby>2<ruby>C<rt>13</rt></ruby>