Question

Allegra, a common prescription drug with the structure shown below, is given for treatment of seasonal allergies. How many stereogenic carbons does Allegra possess?

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is A $1$

Allegra, a common prescription drug Fexotenadine, is sold under the trade name Allegra among other is an antihistamine pharmaceutical drug used in treatment of allergy symptoms, such as hay fever and urtivaria. In this structure there is only one stereogenic carbon center.