methotrexate cancer chemotherapy and immunosuppressive drug molecule. skeletal formula.

methotrexate cancer chemotherapy immunosuppressive drug molecule skeletal formula metotrexate methotrexat antifolate mtx antimetabolite autoimmune tumor ectopic pregnancy abortion folic acid rheumatoid arthritis psoriasis lupus sarcoidosis crohn teratogenic dihydrofolate reductase carbon hydrogen oxygen nitrogen atoms atomic molecular compound composition chemical chemistry structure line drawing flat icon vector