The deamination of cyclaradine corresponding to a carbocyclic analogue
of ara-A having anti-HSV activity by adenosine deaminase was examined
under various pressure. The deamination of (+)- and (+/-)-cyclaradine
was remarkably facilitated by high pressure, and the rate was increas
ed with increasing of pressure. However, (-)-cyclaradine was not deami
nated even under high pressure.