Who are GB491 combined with Letrozole's main competitors?

No direct comparators detected in our index.

How often does this brief refresh?

Every 30 minutes from primary sources (FDA, EMA, MHRA, PMDA, ClinicalTrials.gov, USPTO). Subscribe to the RSS feed below for push alerts.

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Last reviewed 2026-05-16 · How we verify

GB491 combined with Letrozole — Competitive Intelligence Brief

GB491 combined with Letrozole (GB491 combined with Letrozole) competitive landscape: 0 comparators, recent regulatory actions, upcoming PDUFA, patent timeline. Class: CDK4/6 inhibitor (presumed) combined with aromatase inhibitor. Area: Oncology.

phase 3 CDK4/6 inhibitor (presumed) combined with aromatase inhibitor Oncology Small molecule Live · refreshed every 30 min

Target snapshot

GB491 combined with Letrozole (GB491 combined with Letrozole) — Genor Biopharma Co., Ltd.. GB491 combined with Letrozole works by inhibiting a molecular target (likely CDK4/6 or similar cell-cycle regulator) to arrest tumor cell proliferation, while Letrozole blocks aromatase to reduce estrogen production in hormone receptor-positive breast cancer.

Comparator set

Auto-detected by same drug class / molecular target / therapeutic area, ranked by phase + recency. Override with ?vs=slug1,slug2,….

Drug	Generic	Sponsor	Phase	Class	Target	Approval / PDUFA
GB491 combined with Letrozole TARGET	GB491 combined with Letrozole	Genor Biopharma Co., Ltd.	phase 3	CDK4/6 inhibitor (presumed) combined with aromatase inhibitor

Recent regulatory actions (last 90 days)

No regulatory actions in the last 90 days for this set.

Upcoming PDUFA dates (next 180 days)

No PDUFA dates in the next 180 days for this set.

Patent timeline (forward window)

No upcoming patent expiries for this set.

Sponsor landscape (CDK4/6 inhibitor (presumed) combined with aromatase inhibitor class)

Genor Biopharma Co., Ltd. · 1 drug in this class

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Cite this brief

Drug Landscape (2026). GB491 combined with Letrozole — Competitive Intelligence Brief. https://druglandscape.com/ci/gb491-combined-with-letrozole. Accessed 2026-05-16.

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