During the procurement process of GS-441524 raw materials by Activet Pharma Chr Olesen, in order to ensure compliance of the process and reliability of the quality, they provided us with extremely detailed and systematic document materials. The content not only covered basic qualification certificates and quality certifications, but also extended to the full-dimensional technical archives of raw materials from research, production process, purity analysis to long-term stability studies. Both parties conducted multiple rounds of detailed written communication and confirmation on issues such as pharmacological data, impurity spectrum control, compliant transportation plans, and subsequent quality inspection standards. Facing the complex technical documents and compliance requirements, our team responded and supported with professional and efficient collaboration, ultimately facilitating the successful conclusion of this transaction. This cooperation not only demonstrated Activet Pharma Chr Olesen's rigorous and responsible procurement risk control system, but also laid a solid foundation of trust for future deeper cooperation.
First communication
Clarify the procurement requirements and sign relevant documents such as contracts.
Client Profile
Product Specification
The client required high-purity (2R,3R,4S,5R)-2-(4-aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-3,4-dihydroxy-5-(hydroxymethyl)oxolane-2-carbonitrile, commonly known as GS-441524. This compound serves as a key intermediate in antiviral drug development programs, requiring stringent quality control and documentation standards to meet European regulatory requirements.
Data Preparation
Provide the COA, MOA, flow-chart and other documents as per the customer's requirements.
Project Challenges
The procurement process for pharmaceutical-grade materials destined for European markets involves comprehensive regulatory compliance. The client's quality assurance team mandated a complete documentation package including:
Batch List (Olesen Pharma specific format)
Certificate of Analysis (COA) with full analytical data
Certificate of Conformity confirming compliance with specifications
Process Flow Chart detailing manufacturing steps
Method of Analysis (MOA) documentation
GMO Declaration and related compliance certificates
Additional quality assurance documents as per client requirements
Furthermore, the packaging specifications required dual-layer protection: primary packaging in PE bags with appropriate desiccant, followed by secondary packaging in aluminum foil bags with moisture barrier properties. Final shipment was to be arranged via FedEx express delivery with door-to-door service to ensure timely delivery and chain of custody.
Shaanxi Achieve Chem-tech's Solution
As a professional technology enterprise that has been deeply engaged in the field of pharmaceutical intermediates and raw materials for many years, our Company, with its profound research and development accumulation and rigorous production management system, has established a mature, flexible and highly customized solution service system. The company not only focuses on the synthesis and process optimization of conventional intermediates, but also demonstrates outstanding technical response and compliance integration capabilities when facing increasingly complex international market demands. Its capabilities cover the entire chain from kilogram-level laboratory research to ton-level commercial production, and can provide customers with end-to-end services including route design, process development, analysis and testing, and regulatory document support, effectively helping customers accelerate the product development process and cope with challenges in the global market.
Our products
We will negotiate individually, OEM/ODM, No brand, for secience researching only.
GS-441524: New Hope for Targeted Antiviral Therapy for Feline Infectious Peritonitis
GS-441524 is a small molecule nucleoside analogue. Its chemical name is (2R,3R,4S,5R)-2-(4-amino pyrrolo[2,1-F][1,2,4]triazine-7-yl)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-carboxamide, with a CAS number of 1191237-69-0. As the main active metabolite of Remdesivir (GS-5734), GS-441524 demonstrates unique advantages in the field of antiviral treatment, especially becoming a landmark drug in the treatment of feline infectious peritonitis (FIP).
Mechanism of Action: Blocking a critical step in viral replication
GS-441524 mimics natural nucleotides and interferes with the activity of the viral RNA-dependent RNA polymerase (RdRp). Inside the cell, it is phosphorylated by kinases to become an active triphosphate metabolite (NTP), competing with natural triphosphate nucleotides (such as ATP, GTP) for binding to RdRp. When the viral RNA chain is synthesized, GS-441524-NTP is incorporated into the transcribed product, causing premature termination of chain extension and thereby inhibiting virus replication. This mechanism makes it effective against various RNA viruses, including coronaviruses, Ebola viruses, respiratory syncytial viruses, etc.
Clinical Application: Breakthrough Treatment for Feline Infectious Peritonitis
FIP is a fatal disease caused by a mutated feline coronavirus (FCoV), and traditional treatment methods are limited with a very poor prognosis. The emergence of GS-441524 has brought a revolutionary change to the treatment of FIP:
Effective virus suppression
In cell experiments, the half-effective concentration (EC50) of GS-441524 against FIPV was only 0.78 μM, and it had extremely low cytotoxicity to feline cells (CC50 > 100 μM), with a wide therapeutic window.
Significant clinical efficacy
Multiple field trials have shown that subcutaneous injection of GS-441524 (dose 4 mg/kg/day, for 12 weeks) can achieve complete remission in approximately 80% of FIP cats, with a recurrence rate of less than 20%. For cases of dry FIP or those with neurological symptoms, good results can still be achieved by adjusting the dose (e.g., increasing to 8-10 mg/kg/day).
Penetrating the blood-brain barrier
GS-441524 can pass through the blood-eye barrier and blood-brain barrier, and has significant efficacy for FIP cats with affected eyes and central nervous system, which is an advantage that traditional drugs cannot match.
Reach a cooperation agreement
Payment, delivery, and subsequent document preparation.
Project Outcome
The project was completed successfully with:
On-time delivery
All materials delivered within the agreed timeframe
Zero quality complaints
All batches met or exceeded specification requirements
Complete documentation
All requested certificates and documents provided without delay
Client satisfaction
The client has since placed repeat orders and expanded the business relationship
Why Choose Shaanxi Achieve Chem-tech?
This case demonstrates our core competencies:
Technical expertise: Deep understanding of complex chemical synthesis and purification
Quality commitment: Rigorous quality control systems meeting international standards
Documentation capability: Ability to prepare comprehensive regulatory documentation
Customer focus: Flexibility to meet specific client requirements
Global logistics experience: Proven track record in international shipments
We continue to serve pharmaceutical companies worldwide with high-quality intermediates and APIs, backed by our commitment to quality, reliability, and customer satisfaction.