Munronoids A–J, ten new limonoids from Munronia unifoliolata Oliv

Ten new limonoids, named munronoids A–J (1–10), were isolated from Munronia unifoliolata Oliv. These limonoids involved in the skeletons of peieurianin, evodulone, euphane, and havanensin-types of limonoids, and their structures were established on the basis of spectroscopic data and X-ray crystallographic method. Compounds 1 and 2 were rollout of the conjugated Δ8,30 and Δ14,15 double bonds in peieurianin-type, 3–6 featuring a γ-lactone ring instead of the β-substituted furan ring were found in the evodulone-type for the first time. The insecticidal and anti-TMV activities of compounds 1–10 were also evaluated.