186581-53-3
重氮甲烷
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3084-17-1
5-chloro-5-tropolone
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13187-38-7
5-chloro-2-methoxycyclohepta-2,4,6-trien-1-one
7157-27-9
2,5-dichlorocyclohepta-2,4,6-trien-1-one