preferred_name: 3-(galactopyranosyloxy)-N-(3-{4-[3-({2-[(3-{4-[3-({[3-(galactopyranosyloxy)-5-nitrophenyl]carbonyl}amino)propyl]piperazin-1-yl}propyl)amino]-3,4-dioxocyclobut-1-en-1-yl}amino)propyl]piperazin-1-yl}propyl)-5-nitrobenzamide