Code L01BB - purine analogues. ATC (Anatomic Therapeutic Chemical). Level 4
Level below
Code L01BB02
mercaptopurine
Code L01BB03
tioguanine
Code L01BB04
cladribine
Code L01BB05
fludarabine
Code L01BB06
clofarabine
Code L01BB07
nelarabine
Level higher
Code L01B
antimetabolites