Lymecycline
(2S)-6-[[[(Z)-[(4S,4aS,5aS,6S,12aS)-4-(dimethylamino)-6,10,11,12a-tetrahydroxy-6-methyl-1,3,12-trioxo-4,4a,5,5a-tetrahydrotetracen-2-ylidene]-hydroxymethyl]amino]methylamino]-2-aminohexanoic acid