echiguanine A

N-(3-Amino-3-iminopropyl)-2-amino-4-hydroxy-7H-pyrrolo[2,3-d]pyrimidine-5-carboxamide

N-(2-Amidinoethyl)-2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidine-5-carboxamide