3,3'-diiodothyronine 3,3'-diiodothyronine 3,3'-diiodothyronine, also known as 3,3'-t2, is a metabolite of thyroid hormone. 3,3'-diiodothyronine names iupac name 3,3′-diiodo-dl-thyronine systematic iupac name 2-amino-3-propanoic acid other names o-(4-hydroxy-3-iodophenyl)-3-iodotyrosine identifiers cas number 70-40-6 y 3d model (jsmol) interactive imageinteractive image chebi chebi:35430 chemspider 59002 y iuphar/bps 6648 mesh 3,3'-diiodothyronine pubchem cid 65559 unii gnc4mz8b3q y inchi inchi=1s/c15h13i2no4/c16-10-7-9(2-3-13(10)19)22-14-4-1-8(5-11(14)17)6-12(18)15(20)21/h1-5,7,12,19h,6,18h2,(h,20,21) ykey: cpcjbzabtuognm-uhfffaoysa-n yinchi=1/c15h13i2no4/c16-10-7-9(2-3-13(10)19)22-14-4-1-8(5-11(14)17)6-12(18)15(20)21/h1-5,7,12,19h,6,18h2,(h,20,21)key: cpcjbzabtuognm-uhfffaoyaw smiles nc(c(o)=o)cc1=cc(i)=c(oc2=cc=c(o)c(i)=c2)c=c1o=c(o)c(n)cc2ccc(oc1cc(i)c(o)cc1)c(i)c2 properties chemical formula c15h13i2no4 molar mass 525.077 g/mol except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references it is formed from the breakdown of triiodothyronine. levels can be affected in certain disease states. reactions synthesis of t2 from t3, and from reverse t3