The present invention relates to hepcidin antagonists novel formula (I), and pharmaceutical compositions of iron metabolism disorders, such as, in particular, anemia and iron deficiency diseases in particular, anemia associated with chronic inflammatory diseases (especially I include their use as a medicament for the treatment of anemia) AI anemia and ACD, chronic disease, inflammation. [Formula 1]本発明は、式(I)の新規なヘプシジン拮抗薬に関するものであり、医薬組成物ならびに特には鉄代謝障害、例えば、特には鉄欠乏性疾患および貧血、特に慢性炎症性疾患に関連する貧血(ACD、慢性疾患の貧血およびAI、炎症の貧血)の治療のための医薬としてのそれらの使用を含む。【化1】