[biological_process] adenosine 5'-(hexahydrogen pentaphosphate) catabolic process <sep> cell-cell signaling <sep> diadenosine hexaphosphate catabolic process <sep> diadenosine pentaphosphate catabolic process <sep> diadenosine polyphosphate catabolic process <sep> diphosphoinositol polyphosphate catabolic process <sep> diphosphoinositol polyphosphate metabolic process <sep> RNA decapping