Dimethyl Sulfoxide (DMSO)
Allicin (Allyl)
Cysteine Sulfoxide
Thiosulfinate
Thiocarboxylic Acid
Thioamide
Thioglycoside

Alliin is a sulfoxide that is a natural constituent of fresh garlic. It is a derivative of the amino acid cysteine.

Thiocarboxylic acid

https://en.m.wikipedia.org/wiki/Thiocarboxylic_acid

Thioamide-Containing Peptides and Proteins

https://link.springer.com/chapter/10.1007/978-981-13-7828-7_8

Mechanistic Investigations into the Application of Sulfoxides in Carbohydrate Synthesis

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4794778/

Sulfur-Element containing metabolic pathways in human health and crosstalk with the microbiome

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10439400/

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Citric Acid =
Tricarboxylic Acid

There is very minimal difference in the chemical composition of both ascorbic acid and citric acid, that is, an additional oxygen atom in citric acid.

Thioacid, an organic acid in which one or more of the oxygen atoms have been replaced by sulfur atoms; for example, thiosulfuric acid.

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Fat-Soluble
Lipid Derivative

Sulfoxide
Allicin
Thiamine
Sulbutiamine
Thiazole
Pyrimidine

Serine
Cysteine Sulfoxide

DMSO
Iron–Sulfur Proteins
S-Adenosyl Methionine

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a series of derivatives with disulfide bonds containing pyridine, pyrimidine, thiophene, thiazole, benzothiazole, and quinoline were designed and synthesized based on the various biological activities of allicin disulfide bond functional groups.