Lanthionine is a nonproteinogenic amino acid with the chemical formula (HOOC-CH(NH2)-CH2-S-CH2-CH(NH2)-COOH). As the monosulfide analog of cystine, lanthionine is composed of two alanine residues that are crosslinked on their β-carbon atoms by a thioether linkage. Despite its name, lanthionine does not contain the element lanthanum.

CAS：922-55-4
中文别名：
英文别名：LANTHIONINE;L-Cysteine, S-(2-amino-2-carboxyethyl)-, (R)-;Sulfide, bis(2-amino-2-carboxyethyl), [R-(R*,R*)]-;L-Lanthionin;D,L-Lanthionine;
分子式：C6H12N2O4S
分子量：208.235
精确质量：208.052
Psa：151.94
Logp：-0.056

EINECS号：213-076-7

密度：1.499g/cm3
沸点：462.6ºC at 760 mmHg
熔点：280-283ºC
闪点：233.5ºC
折射率：1.606

安全说明：S24/25
海关编码：2930909090