preferred_name: 5,12-NAPHTHACENEDIONE, 10-((3-(((4R)-1-(4-CARBOXY-1-OXOBUTYL)-4-HYDROXY-L-PROLYL-L-ALANYL-L-SERYL-(2S)-2-CYCLOHEXYLGLYCYL-L-GLUTAMINYL-L-SERYL-L-LEUCYL)AMINO)-2,3,6-TRIDEOXY-.ALPHA.-L-LYXO-HEXOPYRANOSYL)OXY)-7,8,9,10-TETRAHYDRO-6,8,11-TRIHYDROXY-8-(2-HYD