has role sulfide(2-) hydrogen sulfide hydrosulfide HS HS(-) hydrosulfide CHEBI:29919 sulfanide [S-][H] InChI=1S/H2S/h1H2/p-1 HS anion CAS:15035-72-0 32.98044 hydrogen(sulfide)(1-) hydrogen sulfide -1 33.07394 RWSOTUBLDIXVET-UHFFFAOYSA-M Gmelin:24766 chebi_ontology sulfur hydride Saccharomyces cerevisiae metabolite human metabolite