Partial agonistic effect of 9-hydroxycorynantheidine on mu-opioid receptor in the guinea-pig ileum.
Matsumoto, K., Takayama, H., Ishikawa, H., Aimi, N., Ponglux, D., Watanabe, K., Horie, S.
Life Sciences, 78(19), 2265-2271 (2006)