동진제약

In a sentence

• 동진제약은 새로운 약을 개발했습니다.

  Dongjin Pharmaceutical has developed a new medicine.

  In this context, '동진제약' is used as a proper noun to refer to a company name.

• 동진제약에서 일하는 친구가 있어요.

  I have a friend who works at Dongjin Pharmaceutical.

  Here, '동진제약' again represents the company name but is used as the workplace of the speaker's friend.

• 동진제약의 신제품 발표회에 참석했습니다.

  I attended the new product launch event of Dongjin Pharmaceutical.

  This sentence illustrates '동진제약' in a possessive form, denoting the ownership of the event being described.