98420-26-9 D-Glutamine, D-prolyl-D-glutaminyl-D-leucyl-D-leucyl-D-lysyl-D-leucyl-D-leucyl-D-glutaminyl-D-leucyl-D-leucyl-D-lysyl-D-leucyl-D-leucyl-D-glutaminyl-D-lysyl-D-phenylalanyl-D-glutaminyl-D-lysyl- Des-(1-13) beta-endorphin beta-Endorphin (13-31) beta-Endorphin, des(1-13)- beta-Endorphin-(13-31)