Page 192 - Phytochemistry 2 (06-PG 605)
P. 192

Clinically useful synthetic khellin analogues
     A-Sodium cromoglycate

It was used for treatment of asthma since 1968.
   Essential chemical features required for activity

  Coplanarity of chromone nuclei,
  Flexible dioxy alkyl link
  Carboxyl groups at C-2.
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