| 释义 |
coumarin Chem.|ˈkuːmərɪn|
[a. F. coumarine, f. coumarou = cumarú, native name in Guiana of the Tonka bean + -in.]
A crystalline substance (C9H6O2), with aromatic odour, found in the seeds of the cumarú, coumarou, or Tonka bean; also in melilot, woodruff, sweet-scented vernal grass, etc.
1830Lindley Nat. Syst. Bot. 92 The volatile oil of the Coumarouma odorata, or Tonka Bean, has been ascertained to be a peculiar principle called Coumarin. 1882J. Smith Dict. Econ. Plants 136 It is probable that hay-fever..may be attributed to the coumarin in the atmosphere.
Hence ˈcoumaric a., in coumaric acid, an acid (C9H8O3) obtained from coumarin; ˈcoumarate, a salt of coumaric acid.
1863–72Watts Dict. Chem. II. 93 Coumaric acid decomposes carbonates. The formula of the coumarates is C9H7O2. M. |