4'-O-phosphonoadenosin-5'-yl (3R)-4-({3-[(2-{[(3,5-dihydroxyphenyl)acetyl]amino}ethyl)amino]-3-oxopropyl}amino)-3-hydroxy-2,2-dimethyl-4-oxobutyl dihydrogen diphosphate
4'-o-phosphonoadenosin-5'-yl (3r)-4-({3-[(2-{[(3,5-dihydroxyphenyl)acetyl]amino}ethyl)amino]-3-oxopropyl}amino)-3-hydroxy-2,2-dimethyl-4-oxobutyl dihydrogen diphosphate