Objective To study the chemical constituents of Abacopteris penangiana. Methods The compounds were separated and purified by various chromatographic techniques and their structures were elucidated on the basis of physiochemical properties and spectroscopic methods. Results Seven compounds were purified and their structures were identified as: (7′Z)-3-O-(3,4-dihydroxy phenylethenyl)-caffeic acid (1), caffeicin B (2), matteucinol (3), protocatechuic acid (4), p-methoxybenzoic acid (5), β-sitosterol (6), and daucosterol (7). Conclusion Compound 1 is a new phenolic acid compound named abacopteric acid, and the other compounds are isolated from the plant for the first time. Objective To study the chemical constituents of Abacopteris penangiana. Methods The compounds were separated and purified by various chromatographic techniques and their structures were elucidated on the basis of physiochemical properties and spectroscopic methods. Results Seven compounds were purified and their structures were identified as: (7 (3), protocatechuic acid (4), p-methoxybenzoic acid (5), β-methylbenzoic acid sitosterol (6), and daucosterol (7). Conclusion Compound 1 is a new phenolic acid compound named abacopteric acid, and the other compounds are isolated from the plant for the first time.