β- Phenyl- 1, N²- ethenoguanosine- 3', 5'-cyclic monophosphate- [8- thiomethylamido- (octaethoxy)- ethylamidomethylthio- 8]- β- phenyl- 1, N²- ethenoguanosine- 3', 5'-cyclic monophosphate ( PET-cGMP- P 054-01 图片