| Ternary and quaternary heterocyclic compounds | | Ethylene, Eopxiconazole, Temocillin, Penicillin | Ternary heterocyclic compounds are often the key intermediates for the preparation of heterocyclic biocides. Temocillin and penicillin are beta amide heterocyclic fungicides with high fungicidal activity |
| Five-membered heterocyclic compounds | Thiazoles | Thiabendazole, Etridiazole Ethaboxam | Thiazole biocides possess a wide range of applications. In addition to inhibiting microbial corrosion, it can also be used to control harmful microorganisms in farmland |
| Furan | Fuberidazole, Fenfuram Furalaxyl | Furan biocides have a wide range of biological activities, which can be used for sterilization, insecticidal and so on |
Azole | Pyrrolnitrin, Fenpiclonil Fludioxonil | Pyrrole biocides are derived from natural product nitropyrrolidins, among which imidazole methyl pyrrole compounds have the most prominent fungicidal activity |
Oxazoles | Ibotenic acid, Hymexazol Famoxadone, Glyodin Imazalil, Oxpoconazole | Oxazoles biocides have good broad spectrum, bactericidal and permeability |
| Pyrazoles | Pyrazophos, Furametpyr Pyraclostrobin | Pyrazole fungicide is a new type of heterocyclic biocides, which evolved from pyraclon |
Triazoles[51] | Luotrimazole, Imazalil Bayleton[52] Diniconazole, Triadimenol | Triazole biocides have excellent bactericidal properties and broad spectrum, and are the most widely used fungicides[51] |
| Six-member hetero-cyclic compounds | Pyrimidines | Ferimzone, Mepanipyrim Cyprodinil, Pyrimethanil | Pyrimidines are widely distributed and can be derived from a variety of natural extracts |
| Pyridines | Fiuazinam, Sodium pyrithione, Fluopicofide | The research and application of six membered cyclic pyridine fungicides are few, they are potential fungicides |
| Benzimidazoles | | Benomyl, Carbendazim | Benzimidazole biocides have the advantages of broad spectrum and low toxicity |