however , the potency of beta-lph 61-69 and alpha-endorphin appeared to be approximately the same whereas that of beta-endorphin was less than that of acth 4-10 after intraventricular administration ( approximate ed50 of alpha-endorphin 0.2 x 10 ( -11 ) m rat ) .
C0051356
alpha-endorphin
C0014242
endorphin