lithium (6E)-4-hydroxy-6-[[4-[hydroxy-[[(4Z)-4-[(Z)-(8-hydroxy-1-oxo-3,6-disulfo-naphthalen-2-ylidene)hydrazinylidene]-3-methoxy-1-cyclohexa-2,5-dienylidene]amino]amino]-2-methoxy-phenyl]hydrazinylide