鲁比前列素是一中化学类治疗便秘的药物。7-[(1r,4r,6r,9r)-4-(1,1-difluoropentyl)-4-hydroxy-8-oxo-5-oxabicyclo[4.3.0]non-9-yl]heptanoic acid; (11a)-16,16-Difluoro-11-hydroxy-9,15-dioxo-prostan-1-oic Acid; (11alpha,15R)-16,16-difluoro-15-hydroxy-9-oxo-11,15-epoxyprostan-1-oic acid; (8beta,11alpha,15R)-16,16-difluoro-15-hydroxy-9-oxo-11,15-epoxyprostan-1-oic acid