Structual Formular of 2-Hydroxyadenine:

Isoguanine and 2-hydroxyladenine are one and the same compound, but 2-Hydroxyadenine is NOT! 2-Hydroxyadenine is a legimate TAUTOMERE of Isoguanine but it has a slightly different structural formular; thus, the forward link should be corrected or the Tautomere should be displayed as well.