G 1535 (OTTO) Guanosine, 99% Cas 118-00-3 - used as a constituent of nucleic acids. G 1535 (OTTO) Guanosine, 99% Cas 118-00-3 - used in metallic paints, simulated pearls, plastics, cosmetics industry etc,. G 1535 (OTTO) Guanosine, 99% Cas 118-00-3 -used in pharmacokinetics as a prodrug. G 1535 (OTTO) Guanosine, 99% Cas 118-00-3 - used in cell culture applications as a precursor of GMP.