Six new limonoids, munropins A-F (1-6), were isolated from the aerial parts of a Chinese medicinal plant, Munronia pinnata (Meliaceae). The structures of 1-6 were assigned by detailed analyses of their spectroscopic data. Munropins A (1) and B (2) are limonoids possessing a prieurianin skeleton with alpha,beta-unsaturated gamma-lactam moieties at C-17. Munropins C (3), D (4), and E (5) are also prieurianin type limonoids with an alpha,beta-unsaturated gamma-lactone moiety, an acetyl group, and an acetoxyacetyl group at C-17, respectively. Munropin F (6) was assigned as a nimbolinin type limonoid with a gamma-hydroxy-alpha,beta-unsaturated gamma-lactone moiety. (C) 2019 Elsevier Ltd. All rights reserved.