EP4303211A1 - INDUSTRIAL PROCESS FOR THE PREPARATION OF HEXANOIC ACID, 6(NITROOXY)-,(1S,2E)-3-[(1R,2R,3S,5R)-2-[(2Z)-7-(ETHYLAMINO)-7-OXO-2-HEPTEN-1-YL]3,5-DIHYDROXYCYCLOPENTYL]-1-(2-PHENYL ETHYL)-2-PROPEN-1-YL ESTER AND HIGH PURE PRODUCT