Synonyms: Spiro[2,24-dioxabicyclo[21.3.1]heptacosa-4,18-diene-25,2'-[2H]pyran]-3-one,10-[[2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl-a-L-arabino-hexopyranosyl]oxy]-20-ethyl-3',4',5',6'-tetrahydro-6,7,9,11,12-pentahydroxy-6'-(2-hydroxybutyl)-5',6,8,12,27-pentamethyl-,[1S-[1R*,4E,6S*,7R*,8R*,9S*,10R*,11S*,12S*,18E,20S*,23R*,25S*[5'R*,6'R*(S*)],27S*]]-;Antibiotic A 59770A