<td>I</td>
<!--Inosine-->
<td>X</td>
- <!--Xanthine (sometimes Unknown)-->
+ <!--Unknown (sometimes Xanthine)-->
<td>R</td>
<!--Unknown Purine-->
<td>Y</td>
<td bgcolor="#f0fff0"></td>
<td bgcolor="#f0fff0"></td>
<td bgcolor="#ffffff"></td>
- <td bgcolor="#2f4f4f"></td>
+ <td bgcolor="#4f6f6f"></td>
<td bgcolor="#CD5C5C"></td>
<td bgcolor="#008000"></td>
<td bgcolor="#4682B4"></td>