106117-28-6 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine 21H,23H-Porphine, 2,3,7,8,12,13,17,18-octaethyl- 2683-82-1 991-75-3 EINECS 220-243-8 Octaethylporphine