Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocker (<10uM)?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a. O=c1ccc2c(OCCCCc3ccccc3)c3ccoc3cc2o1
b. COc1cc(N2C(=O)N(c3ccc(-c4ccc(C(=O)O)cc4C)cc3)C(=O)C23CCN(Cc2ncccc2C)CC3)ncn1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {herg_blocker#not &NULL}a {herg_blocker__names__noun}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%herg_blocker%}
Answer: {%multiple_choice_result}
4-(4-phenylbutoxy)furo[3,2-g]chromen-7-one