21211
We studied the equilibrium conformations of a zinc porphyrin tweezer composed of two carboxylphenyl - functionalized zinc tetraphenyl porphyrin subunits connected by a 1 , 4 - butyndiol spacer , which was suspended inside the amphiphilic regions of 1 , 2 - distearoyl - sn - glycero - 3 - phosphocholine ( DSPC ) liposomes .
 Chemical: zinc porphyrin; Chemical: carboxylphenyl; Chemical: zinc tetraphenyl porphyrin; Chemical: 1 , 4 - butyndiol; Chemical: 1 , 2 - distearoyl - sn - glycero - 3 - phosphocholine; Chemical: DSPC
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: zinc porphyrin; Chemical: carboxylphenyl; Chemical: zinc tetraphenyl porphyrin; Chemical: 1 , 4 - butyndiol; Chemical: 1 , 2 - distearoyl - sn - glycero - 3 - phosphocholine; Chemical: DSPC