Hợp chất sau đây có tên theo danh pháp IUPAC là gì?

2-(7-amino-5-methylbenzo[d]oxazol-2-yl)acetaldehyd

7-amino-5-ethylbenzo[d]oxazol-2-yl-acetaldehyd

1-amino-3-methylbenzo[d]oxazol-2-yl-acetaldehyd

2-(7-amino-5-methylbenzoxazol-2-yl)acetaldehyd