108375-77-5 Oxacyclohexadeca-3,5,11,13-tetraen-2-one, 16-((1S,2R,3S)-3-((2R,4R,5S,6R)-4-((2,6-dideoxy-beta-D-arabino-hexopyranosyl)oxy)tetrahydro-2-hydroxy-5-methyl-6-((1E,3E)-1,3-pentadienyl)-2H-pyran-2-yl)-2-hydroxy-1-methylbutyl)-8-hydroxy-3,15-dimethoxy-5,7,9,11-tetramethyl-, (3Z,5E,7R,8S,9S,11E,13E,15S,16R)- PC 766B PC-766B