2(1H)-Pyrimidinone, 1-(2-deoxy-5-O-(hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-erythro-pentofuranosyl)-4-methoxy- 88254-09-5 O(4)-Methyldeoxythymidine triphosphate O(4)-Methylthymidine triphosphate mTTP