A smaller, distinct component of a larger molecule or compound.
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13,15-bis(ethoxycarbonyl)-2,5,8,11-tetraoxa-14-thiabicyclo<10.3.0>pentadeca-1(15),12-diene
28,40-O-bis(triethylsilyl)-19(R),20(R)-dihydroxyrapamycin
N-{4-chloro-5-nitro-6-methoxy-8-quinolinyl}acetamide
Benzene, 1,3,4-trimethoxy-2-methyl-5-(1-propenyl)-
