IUPAC:2-(2-{2-chloro-3-[2-(1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)ethylidene]cyclopent-1-en-1-yl}ethenyl)-1,3,3-trimethyl-3H-indol-1-ium chloride
IUPAC:2-(2-{2-chloro-3-[2-(1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)ethylidene]cyclopent-1-en-1-yl}ethenyl)-1,3,3-trimethyl-3H-indol-1-ium chloride