Product Details Not Logged In  (R)-(+)-3-Hydroxy-5-oxo-1-cyclopentene-1-heptanoic acid Product# : 25 CAS# : 54996-33-7 Product Details: Bulk product. Key intermediate for E series prostaglandins via 2 component coupling strategy. Request Price Quote and Certificate of Analysis Request Material Safety Data Sheet (MSDS) Download Product Information (PDF) - Not Available