(R)-(-)-2-N-(Theophyllinyl-7'-ethyl)-2-acetamino-1-acetoxybutane 69463-38-3 Acetamide, N-(1-((acetyloxy)methyl)propyl)-N-(2-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purin-7-yl)ethyl)-, (R)-(-)-