4-[12-[(1-chloranyl-5,6,7-trimethyl-pyrrolo[3,4-d]pyridazin-3-ium-3-yl)methyl]-10,11-dimethyl-3,4,6,7,11-pentazatricyclo[7.3.0.0^{2,6}]dodeca-1(12),2,4,7,9-pentaen-5-yl]-1,2,5-trimethyl-pyrrole-3-carbaldehyde

P11838 — Endothiapepsin