Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a or b without using any additional words.
Options:
a CCC1C(=O)N(c2ccccc2)N(c2ccccc2)C1=O
b COC(=O)C12Oc3ccc(-c4ccc5c(c4O)C(=O)C4=C(O)CC(C)C(O)C4(C(=O)OC)O5)c(O)c3C(=O)C1=C(O)CC(C)C2O
Answer: b
Task: Please answer the multiple choice question.
Question: Which molecule has the highest {acute_toxicity__names__noun}?
Constraint: Even if you are {#uncertain|not sure!}, you must pick either {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%acute_toxicity%}
Answer: {%multiple_choice_result}