83708-78-5

1H-Cyclohepta[2,1-b:4,5-b']dipyrrole-6- propanoic acid,7-[[3-(2-carboxyethyl)-5-[(3- ethenyl-1,5-dihydro-4-methyl-5-oxo-2Hpyrrol- 2-ylidene)methyl]-4-methyl-1Hpyrrol- 2-yl]methyl]-2,3,5,5a-tetrahydro-3,5adimethyl- 2-oxo-