pentacyclo[6.6.6.0~2,7~.0~9,14~.0~15,20~]icosa-4,9,11,13,15(20),16,18-heptaene-3,6-dione;Pentacyclo[6.6.6.0~2,7~.0~9,14~.0~15,20~]icosa-4,9,11,13,15,17,19-heptaene-3,6-dione
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