"Nucleic Acid, Nucleoside, or Nucleotide"^^ . "C534"^^ . "FDA"^^ . "cGMPSYNCI" . "A cellular regulatory agent that acts as a second messenger. Its levels increase in response to a variety of signals (acetylcholine, insulin, oxytocin) and activates specific protein kinases.NCI" . "Cyclic GMP"^^ . "7665-99-8"^^ . "C0018338"^^ . . . "Cyclic GMP"^^ . "cyclic 3',5'-guanosine monophosphateSYNCI" . "Cyclic GMPPTNCI" . "H2D2X058MU"^^ . "CHEBI:16356"^^ . "Guanosine Cyclic 3',5'-(Hydrogen Phosphate)PTDCP05879" . . "Cyclic_GMP"^^ . "Biologically Active Substance"^^ . "GUANOSINE CYCLIC 3',5'-PHOSPHATEPTFDAH2D2X058MU" . . "C10H12N5O7P"^^ . .