Hydrazinecarboxylic acid, (1-(4-((3-amino-2,3,6-trideoxy-alpha-L-lyxo-hexopyranosyl)oxy)-1,2,3,4,6,11-hexahydro-2,5,12-trihydroxy-7-methoxy-6,11-dioxo-2-naphthacenyl)ethylidene)-, 1,1-dimethylethyl ester, (2S-cis)-