Okay, the user wants me to translate "benzonic acid ester" into Thai. Let me check if the term is already in Thai. No, it's in English. So I need to translate it.
First, "benzonic acid" is แอซิดเบนโซอิก in Thai. Then "ester" is เอสเทอร์. So combining them, it should be เอสเทอร์ของแอซิดเบนโซอิก. Wait, in Thai chemical terms, the structure is usually [ester] of [acid], so the order might be reversed. Let me confirm. Yes, in Thai, it's common to say "เอสเทอร์ของ..." so the translation would be เอสเทอร์ของแอซิดเบนโซอิก. That should be correct.