The present disclosure relates generally to compositions and methods for treating cancer and neoplastic disease. Provided herein are substituted pyridine derivative compounds, and compositions (including pharmaceutical compositions) that include these compounds. The subject compounds and compositions are useful for inhibition of at least one histone demethylase. Furthermore, the subject compounds and compositions are useful for the treatment of cancer or neoplastic disease, such as prostate cancer, breast cancer, bladder cancer, lung cancer, melanoma, retinoblastoma, or multiple endocrine neoplasia type 1.