The following is a partial list of the "D" codes for Medical Subject Headings (MeSH), as defined by the United States National Library of Medicine (NLM). This list continues the information at List of MeSH codes (D02). Codes following these are found at List of MeSH codes (D04). For other MeSH codes, see List of MeSH codes. The source for this content is the set of 2006 MeSH Trees from the NLM.

– heterocyclic compounds

– acids, heterocyclic

– cinoxacin

– indoleacetic acids

– isonicotinic acids

– isonipecotic acids

– nicotinic acids

– nipecotic acids

– orotic acid

– picolinic acids

– pipecolic acids

– xanthurenates

– alkaloids

– aconitine

– acronine

– amaryllidaceae alkaloids

– aporphines

– arecoline

– berberine alkaloids

– bicuculline

– camptothecin

– cinchona alkaloids

– colchicine

– dihydro-beta-erythroidine

– emetine

– ergot alkaloids

– harringtonines

– indole alkaloids

– lobeline

– mescaline

– muscarine

– opium

– pilocarpine

– pyrrolizidine alkaloids

– ryanodine

– salsoline alkaloids

– solanaceous alkaloids

– sparteine

– swainsonine

– tropanes

– veratrum alkaloids

– heterocyclic compounds, 1-ring

– azepines

– azetines

– azirines

– azocines

– azoles

– dioxins

– dioxoles

– furans

– lactams

– oxathiins

– oxazines

– oxepins

– oxocins

– piperazines

– piperidines

– pyrans

– pyrazines

– pyridazines

– pyridines

– pyrimidines

– pyrrolidines

– thiazines

– thiepins

– thiophenes

– triazines

– heterocyclic compounds, 2-ring

– benzazepines

– benzimidazoles

– benzodioxoles

– benzofurans

– benzopyrans

– benzothiadiazines

– benzothiazoles

– benzothiepins

– benzoxazines

– benzoxazoles

– benzoxepins

– bicyclo compounds, heterocyclic

– indazoles

– indoles

– indolizines

– isoquinolines

– naphthyridines

– pteridines

– purines

– pyrrolizidine alkaloids

– quinazolines

– quinolines

– quinolizines

– quinoxalines

– heterocyclic compounds, 3-ring

– acridines

– anthramycin

– carbazoles

– carbolines

– cinoxacin

– dactinomycin

– dibenzazepines

– dibenzothiazepines

– dibenzothiepins

– dibenzoxazepines

– dibenzoxepins

– flavins

– phenanthridines

– phenanthrolines

– phenazines

– phenothiazines

– psoralens

– quinpirole

– spectinomycin

– xanthenes

– heterocyclic compounds with 4 or more rings

– aporphines

– berberine alkaloids

– cevanes

– dihydro-beta-erythroidine

– ergolines

– ergotamines

– harringtonines

– morphinans

– pterocarpans

– rifamycins

– rotenone

– tetrapyrroles

– heterocyclic compounds, bridged-ring

– bicyclo compounds, heterocyclic

– cyclazocine

– morphinans

– quinuclidines

– tropanes

– heterocyclic oxides

– cyclic n-oxides

– cyclic p-oxides

– cyclic s-oxides

– pyrans

– aurovertins

– benzopyrans

– glaucarubin

– iridoids

– nigericin

– patulin

– pyran copolymer

– pyranocoumarins

– pyrones

The list continues at List of MeSH codes (D04).