A series of four Zn(II) complexes with asymmetrical porphyrinic ligands were synthesized: [5-(4-hydroxyphenyl)-10. 15. 20-triphenyl-21H. 23H-porphinato]Zn(II) (Zn(II)TPPOHP). https://www.markbroyard.com/super-find-cover-for-ptc-23grc-green-4-each-cheap-great-pick/