to study adenosine effect on melatonin production , rat pineal explants were incubated for 6 h with 10 ( -4 ) m adenosine or 2-chloroadenosine in the presence or absence of 5 x 10 ( -5 ) m norepinephrine ( ne ) .
C0001443
adenosine
C0000275
2-chloroadenosine