3Y8 3y8 3-[(1R,2S,3S,7S,11S,16S,17R,18R,19R)-2,7,12,18-tetrakis(2-hydroxy-2-oxoethyl)-3,13-bis(3-hydroxy-3-oxopropyl)-1,2,5,7,11,17-hexamethyl-17-(3-oxidanyl-3-oxidanylidene-prop-1-enyl)-3,6,8,10,15,16,18,19,21,24-decahydrocorrin-8-yl]propanoic acid 3Y8