イソシトシン

Also known as 2-amino-4-hydroxypyrimidine, 2-amino-4-pyrimidone, 2-amino-4-pyrimdinol, 2-amino-4-oxypyrimidine

Isocytosine or 2-aminouracil is a pyrimidine base that is an isomer of cytosine. The nucleoside form is called isocytidine (iC).