<jats:title>Abstract</jats:title><jats:p>Three new naphthoquinone derivatives, isolated from the stems of <jats:italic>Diospyros maritima</jats:italic> Blume, were elucidated as 2′‐ethoxyisodiospyrin, 3′‐ethoxyisodiospyrin, and 3‐ethoxyisodiospyrin, respectively, on the basis of spectral properties.