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State of

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Country of

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Incorporation/

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Incorporation/

Company Name

Organization

Organization

International Medication Systems, Limited

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California

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United States of America

Amphastar Medication Co., LLC

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California

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United States of America

Armstrong Pharmaceuticals, Inc.

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Massachusetts

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United States of America

Amphastar Nanjing Pharmaceuticals, Inc.

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China

Amphastar France Pharmaceuticals, S.A.S.

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France

Amphastar UK Limited

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United Kingdom

International Medication Systems (UK) Limited

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United Kingdom