From aerial parts of Euphorbia esula esulatin G (1), a novel norparaliane diterpenoid, together with its biosynthetic precursor 5,8,14-triacetoxy-3-benzoyloxy-15-hydroxy-9-oxoparaliane (2) was isolated. Their structures were determined by extensive spectroscopic analysis (IR, MS, NMR, and X-ray diffraction).