this light-induced response was inhibited under the existence of cyclic mononucleotide phosphodiesterase ( pde ) antagonists such as papaverine ( 10 ( -4 ) m ) , theophylline ( 10 ( -3 ) m ) , dibutyril-camp ( 10 ( -4 ) m ) , 3-isobutyl-1-methyl-xanthine ( 10 ( -4 ) m ) and dibutyril-cgmp ( 10 ( -4 ) m ) .
C0039771
theophylline
C0000096
3-isobutyl-1-methyl-xanthine