![4,5,6,7-Tetrahydro-2-[(triphenylphosphoranylidene)amino]-benzo[b]thiophene-3-carboxylic acid ethyl ester](https://www.synchem.de/wp-content/uploads/2017/05/wh219-247x124.png)
![4,5,6,7-Tetrahydro-2-[(triphenylphosphoranylidene)amino]-benzo[b]thiophene-3-carbonitrile](https://www.synchem.de/wp-content/uploads/2017/05/wh218-247x124.png)
![4,5,6,7-Tetrahydro-2-[(triphenylphosphoranylidene)amino]-benzo[b]thiophene-3-carboxamide](https://www.synchem.de/wp-content/uploads/2017/05/wh217-247x124.png)
![5-Phenyl-2-[(triphenylphosphoranylidene)amino]-3-thiophenecarboxylic acid ethyl ester](https://www.synchem.de/wp-content/uploads/2017/05/wh216-247x124.png)
![3,4-Dihydro-6-[(2-methyl-1-oxopropyl)amino]-2H-thiopyran-5-carboxylic acid ethyl ester](https://www.synchem.de/wp-content/uploads/2017/05/wh212-247x124.png)
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