for the following products
8-Benzyl-2-(4-hydroxybenzyl)-6-(4-hydroxyphenyl)imidazo[1,2-a]pyrazin-3(7H)-one | 8-Benzyl-6-(4-hydroxyphenyl)-2-[(4-hydroxyphenyl)methyl]-3H,7H-imidazo[1,2-a]pyrazin-3-one | Coelenteramine | Coelenterazine, native and Coelenterazine
