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system
What is the molecular formula of the molecule identified by 9-phenyl-11-oxa-9,17-diaza-1-azoniapentacyclo[10.7.0.02,10.03,8.013,18]nonadeca-1(12),2(10),3,5,7,13(18),14,16-octaene ?
user
C21H14N3O+
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