2,3,4-tri-O-acetyl-N-[(Z)-({1,2-bis[(benzyloxy)carbonyl]hydrazinyl}sulfanyl){[1,2,3-trimethoxy-10-(methylsulfanyl)-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]imino}methyl]pentopyranosylamine