L-Alanine, N-[(5Z)-7-[(1R,2R,3R,5S)-2-[(1E,3R)-4-(3-chlorophenoxy)-3-hydroxy-1- buten-1-yl]-3,5-dihydroxycyclopentyl]-1-oxo-5-hepten-1-yl]-, 2-[(nitrooxy)methyl]phenyl ester