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Fattiviracin FV-10 is an antiviral substance produced by the fermentation broth of Streptomyces microflavus No. 2445. It has anti-herpes simplex virus type 1 (HSV-1) activity at a concentration of 2.5 μg/mL.

Fattiviracin FV-13 is an antiviral substance produced by the fermentation broth of Streptomyces microflavus No. 2445. It has anti-herpes simplex virus type 1 (HSV-1) activity at a concentration of 2.9 μg/mL.

Feigrisolide C is a lactone produced by Streptomyces griseus.

Semi-synthetic penicillin.

Ferrichrome is a cyclic hexa-peptide that forms a complex with iron atoms.

Ferrichrome A [M+Fe-2H] is a cyclic hexa-peptide that forms a complex with iron atoms.

Ferricrocin-iron is a cyclic hexa-peptide that forms a complex with iron atoms.

Ferrichrysin [M-H2+Fe] is a cyclic hexa-peptide that forms a complex with iron atoms.

Ferrocin A is an iron chelating cyclic decapeptide produced by Pseudomonas fluorescens YK-310. It has anti-gram-negative bacterial activity.

Ferrocin B is an iron chelating cyclic decapeptide produced by Pseudomonas fluorescens YK-310. It has anti-gram-negative bacterial activity.

Ferrithiocin is an iron (III) complex produced by Streptomyces antibioticus.

Herical is a diterpene xyloside produced by Hericium clathroides.

Erinacine A, derived from the Lion's Mane mushroom (Hericium erinaceus), is a bioactive compound with demonstrated anticancer, antitumor, and neuroprotective properties. It induces cancer cell death through the generation of reactive oxygen species (ROS) and is believed to modulate signaling pathways involved in cancer cell apoptosis. Additionally, Erinacine A exhibits neuroprotective effects against neurodegenerative diseases such as Parkinson's and Alzheimer's, potentially mitigating related pathological symptoms.

Hexacycline is a natural metabolite of the fungus Panus rudis HKI 0254. It has moderate anti-Gram-positive bacteria activity, 4-40μg/mL can inhibit the production of oxidants by polymorphonuclear neutrophils (PMNL) stimulated by zymosan. It inhibits the growth of L-930 and K 562 cells with IC50 of 1.4μg/mL and 0.4μg/mL, respectively, and the IC50 of HeLa cells is 10μg/mL. It also has an anti-Plasmodium effect, and its IC50 for Plasmodium falciparum is 2.4μg/mL.

Hexylitaconic acid is a plant growth regulator produced by Aspergillus niger K-88. It has the effect of stimulating plant growth.

Homoalanosine is an amino acid analogue and a derivative of alanosine, an antibiotic used in the treatment of pancreatic cancer.

Homomycin is an aromatic glycoside produced by Streptomyces noboritoensis. It has anti-gram-positive bacteria and mycobacterial activity, and also has an effect on mycoplasma, leptospira, intestinal amoeba, tapeworm, and roundworm.

Hydantocidin is a compound with herbicidal activity produced by Streptomyces hygroscopicus SANK 63584. Its weeding effect on monocotyledonous and dicotyledonous annual weeds is stronger than Bialaphos and similar to the commercial Glyphosate.

7-Hydro-8-methylpteroylglutamyl-glutamic acid is an antifolate produced by actinomycete SK-2049. It only has the activity against Enterococcus faecium and has no effect on other bacteria and fungi. Thymidine and folate-related compounds can counteract its activity.

(+)-5'-Hydroxygriseofulvin is a derivative obtained by fermentation of (+)-griseofulvin or dehydrogriseofulvin through Streptomyces cinereocrocatus. Antifungal activity.