1 87Y 7,8-dihydro-6-hydroxymethyl-7-methyl-7-[2-phenylethyl]-pterin 1.000 2 AOB (E)-2-amino-4-oxo-6-styryl-4,7-dihydro-3h-pyrrolo[2,3-D]pyrimidine-5-carbonitrile 0.760