<jats:title>Abstract</jats:title><jats:p>Two new cyclopeptides, named arenariphilin A (<jats:bold>1</jats:bold>) and arenariphilin B (<jats:bold>2</jats:bold>), were isolated from the whole plants of <jats:italic>Arenaria oreophila.</jats:italic> Their structures were determined as cyclo‐(Thr‐Gly) (<jats:bold>1</jats:bold>) and cyclo‐(Ser<jats:sub>1</jats:sub>‐Gly ‐Ser<jats:sub>2</jats:sub>‐Ile ‐Phe<jats:sub>1</jats:sub>‐Phe<jats:sub>2</jats:sub>) (<jats:bold>2</jats:bold>) on the basis of spectral data, especially by 2D‐NMR.