Glycine, trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolylglycyl-trans-4-hydroxy-L-prolyl-L-prolyl-