es·er·ine /ˈɛsəˌrin/
  毒扁豆鹼; 依色林
  es·er·ine /ˈɛsəˌrɪn/ 名詞
  Es·er·ine n.  Chem. An alkaloid found in the Calabar bean, and the seed of Physostigma venenosum; physostigmine. It is used in ophthalmic surgery for its effect in contracting the pupil.
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