Phytochemical investigation of ethanol extracts of the Pterospermum acerifolium flowers led to the isolation and identification of two new flavones, 4'-(2-methoxy-4-(1,2,3-trihydroxypropyl) phenoxy luteolin (1) and 5,7,3'-trihydroxy-6-O-β-D-glucopyranosyl flavone (2), and one new lactone,