the 2-chloroadenosine effect on cyclic amp accumulation was antagonized by the xanthines with the following order of potency : dpx greater than 8-phenyl-theophylline greater than 8-p-sulpho-phenyl-theophylline greater than verrophylline greater than ibmx greater than theophylline greater than hwa 285 greater than pentoxiphylline greater than caffeine greater than 7-benzyl ibmx greater than theobromine greater than enprofylline greater greater than zk 62,711 .
C0043318
xanthines
C0030899
pentoxiphylline