since under physiological conditions ( 37 degrees c , ph 7.2 ) the half-lifetime of cyclocytidine dissolved in water was 5 hours , the very early appearance of arabinosylcytosine in the serum of rats suggests that various hydrolytic enzymes may also be responsible for the conversion of cyclocytidine in to arabinosylcytosine in vivo .
C0010557
cyclocytidine
C0010711
arabinosylcytosine