Synonyms: 6H-purin-6-one, 2-amino-3,7-dihydro-;C.I. Natural White 1;2-amino-3,7-dihydropurin-6-one;Hypoxanthine, 2-amino-;Pearl Essence;Guanine (2-Amino-6-hydroxypurine);Stella Polaris;CI 75170;CI Natural white 1;6H-Purin-6-one,2-amino-1,7-dihydro-;2-Aminohypoxanthine;Dew Pearl;2-Amino-1,7-dihydro-6H-purin-6-one;2-Amino-6-hydroxy-1H-purine;Mearlmaid AA;Gua;Mearlmaid;Guanine enol;6-Hydroxy-2-aminopurine;6H-Purin-6-one, 2-amino-1,7-dihydro- (9CI);6H-Purin-6-one, 2-amino-1,7-dihydro-;C.I. 75170;2-Amino-1,9-dihydro-purin-6-one;2-amino-1,9-dihydro-6H-purin-6-one;Guanin;2-Amino-6-purinol;2-Amino-6-hydroxypurine;Guanine (8CI);