pyrylium
(education, chiefly attributive) A child seen not only as a client of the education system but also as a person whose play habits, home life, etc. contribute to their development.
plural of Sprengel pump
A female given name from Italian
(organic chemistry) A six-membered aromatic heterocyclic cation containing five carbon atoms and an oxygen atom that carries a positive charge; any derivative of this compound.
触媒酸化反応中に、五つの炭素原子と一つの酸素原子からなる酸素含有六員環の芳香族ヘテロ環陽イオンがNMRで検出された。
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