Modifiers matching metabolite:

• normal,
• active,
• secondary,
• single,
• cytotoxic,
• volatile,
• inorganic,
• toxic,
• fungal,
• critical,
• important,
• ionic,
• organic,
• cellular,
• primary,
• polar,
• valuable,
• antibacterial,
• complex,
• animal,
• nonpolar,
• key,
• endogenous,
• undesirable,
• intermediate,
• essential,
• acid,
• energetic,
• aromatic,
• hydrophilic,
• small,
• harmless,
• urinary,
• common,
• antimicrobial,
• special,
• major,
• nonspecific,
• inhibitory,
• reactive,
• lipophilic,
• soluble,
• noxious,
• chemical,
• hazardous,
• natural,
• insoluble,
• abundant,
• useful,
• acidic,

Simple categories matching endogenous:

• substance,
• compound,
• cause,
• activator,
• ligand,
• sterol,
• lipoprotein,
• control,
• corticoid,
• metabolite,
• diamine,
• steroid,
• macromolecule,
• substrate,
• hormone,
• cation,
• volatile,
• enzyme,
• component,
• signal,
• molecule,
• system,
• virus,
• ion,
• protein,
• antigen,
• catecholamine,
• nucleoside,
• change,
• glucocorticoid,
• chemical,
• contaminant,
• vasopressor,
• amine,
• nucleotide,
• androgen,
• proteinase,
• buffer,
• material,
• chromophore,
• solute,
• fluid,
• acid,
• protease,
• variable,
• phosphatase,
• sugar,
• damage,
• cofactor,
• carbohydrate,
• factor,
• pigment,
• receptor,
• opsonin,
• estrogen,
• metal,
• process,
• polysaccharide,
• pathogen,
• gene,
• soporific,
• acceptor,
• vasoconstrictor,
• monoamine,
• reactant,
• neurotransmitter,
• agent,
• peptide,
• corticosteroid,
• lipid,
• constituent,