63906-67-2 8-Chloro-7-hydroxycaffeine nitrite Theophylline, 8-chloro-7-hydroxymethyl-, nitrite Theophylline, 8-chloro-7-hydroxymethyl-, nitrite (ester) Xanthine, 8-chloro-1,3-dimethyl-7-hydroxymethyl-, nitrite (ester)