Chemical properties and molecular structure of derivatives of sym-heptazine [1,3,4,6,7,9,9b-heptaazaphenalene, tri-1,3,5-triazine]

CONTENTS
I. Introduction 400
II. Does melam exist? 400
III. Melem 401
IV. Melon — the material of Pharoah's serpents 402
V. Cyameluric acid, its salts and amides 403
VI. Hydromelonic acid 404
VII. Other derivatives of sym-heptazine 404