Two modifications define the molecule
Ishaq HM, Mohammad IS, Guo H, Shahzad M, Hou YJ, Ma C et al (2017) Molecular estimation of alteration in intestinal microbial composition in Hashimotos thyroiditis patients
is a Medical Research Council Clinical Doctoral Training Fellow (MR/V028723/1)
PEG-MGF PEG-MGF is a pegylated analog of Mechano Growth Factor, a splice variant of IGF-1 studied for its role in muscle repair and satellite cell activation
L-Carnitine L-Tartrate 4 of 4 defined stereocenters (2R,3R)-2,3-Dihydroxysuccinate de bis[(2R)-3-carboxy-2-hydroxy-N,N,N-trimthyl-1-propanaminium] [French] [IUPAC name generated by ACD/Name] 36687-82-8 [RN] Bis[(2R)-3-carboxy-2-hydroxy-N,N,N-trimethyl-1-propanaminium] (2R,3R)-2,3-dihydroxysuccinate [IUPAC name generated by ACD/Name] Bis[(2R)-3-carboxy-2-hydroxy-N,N,N-trimethyl-1-propanaminium]-(2R,3R)tartrat [German] [IUPAC name generated by ACD/Name] L-Carnitine L-Tartrate L-Carnitine tartrate "(2R,3R)-2,3-dihydroxybutanedioate (2R,3R)-2,3-dihydroxybutanedioate (2r,3r)-2,3-dihydroxybutanedioate
Those are two very different things