R 2 is selected from the group consisting of: hydrogen, -CH(R a )OPO(OH)2, -CO-Y, -i-PO(OY) 2 , --PO(OH) 2 , -C(=0)-Y, -CO-U, -C(=0)-(CH 2 )rU, and -CH 2 -V, where R a is hydrogen or CH 3 , where Y is -Z-(CH 2 )q-W-R b , q is 0-4, where Z and W are independently selected from the group consisting of: CH 2 , O, S, R C and R b , where R c is selected from the group consisting of: hydrogen, C1-C4 alkyl, and C 3 -C 6 cycloalkyl, R b is selected from the group consisting of: hydrogen, C1-C12 alkyl, C1-C12 substituted alkyl, C1-C12 alkenyl, C1-C12 substituted alkenyl, C1-C12 alkynyl, C1-C12 substituted alkynyl, C 3 -Cs cycloalkyl, C 3 -Cs substituted cycloalkyl, C 6 -Cio aryl, C 6 -Cio substituted aryl, C 3 -Cs heterocycloalkyl, C 3 -Cs substituted heterocycloalkyl, C4-C10 heteroaryl, and C4-C10 substituted heteroaryl, where r is 0-5, U is selected from aryl, heteroaryl or heterocycloalkyl, where V is -0-C(=0)-Q-(CH 2 )r-R d , where Q is selected from the group consisting of: a bond, O, and N(R C ), where R d is selected from the group consisting of: C6-C10 aryl, C4-C10 heteroaryl, C 3 -Cs heterocycloalkyl, a hexose, a pentose, and - (5-methyl-2-oxo-l,3-dioxol-4-yl)methyl), or alternatively -C(=0)-Y forms an amide bond thru a nitrogen atom on Y in which case Y is a selected from the group consisting of: glycine, sarcosine, ,-diemthyl glycine, alanine, valine, leucine, isoleucine, lysine, ornithine, arigine, serine, and theronine

Instead, it is recommended to explore new targets using novel, less powerful D2 agonists that can increase the number of D2 receptors
Higher risks may occur when patients: self-dose without supervision buy peptides from unregulated websites use incorrect dosing combine multiple peptides improperly skip follow-up monitoring ignore nutrition and hydration Patients sometimes assume peptide therapy is natural and therefore completely risk-free
If a reduction in the amount of glucose-6-phosphate dehydrogenase or alteration of structure occurs due to G6PD gene mutations, the enzyme loses its protective role, leading to the accumulation of reactive oxygen species and thus damaging red blood cells