Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug prescribed to treat tuberculosis (Mycobacterium tuberculosis). There are ________ chirality centers in ethambutol. 
Definitions:
Expected Time of Return
The projected time when an individual or item is anticipated to return to a specific location or status.
Police Escort
A service provided by the police for ensuring the safety and security of individuals or groups during transportation or when moving through potentially hazardous areas.
Collaborative Partnership Model
A cooperative approach to healthcare that involves shared decision-making among patients, families, and providers.
Mutual Respect
A reciprocal understanding and esteem between individuals or groups, recognizing and valuing each other's rights and feelings.
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