Catalog v1.0 — July 2026

Compounds for people who build the future.

Not repackaged. Not drop-shipped. We synthesize it. On a parallel recombinant system, purified to ≥98%, confirmed by ESI-MS. Every vial has a batch number you can trace back to the resin.

Current queue: 14 days     Batch 07/26 — 3 vials left     Waitlist: by application only
Category 01

Known Peptides

The sequences everyone wants. The difference is we don't buy them from the same two Chinese bulk houses and divide them into smaller vials. Each batch is a discrete synthesis event.

SEMA-GLP
$4.50 / mg
Semaglutide analog. GLP-1R agonist.
Metabolic GLP-1 In Stock

Highest-demand item in the catalog. Binds pancreatic beta cells and hypothalamic neurons with the same pathway equivalence as the FDA-approved reference.

31 amino acids. 4114 Da. ≥98% HPLC. ESI-MS confirmed.

Research dosing: 0.25–2.4 mg SC weekly. Weight loss 12–15% in model systems.

Length:
31 aa
MW:
4114 Da
Batch:
SA-0726-SEMA-07
Availability: 50mg × 4 vials — Next batch: August 14
TIRZ-GLP
$5.50 / mg
Tirzepatide analog. Dual GIP/GLP-1.
Metabolic Dual Agonist Limited

Second-highest demand. Simultaneous GIPR and GLP-1R activation. This is not a generic GLP-1 analog — dual agonism is the current edge of metabolic research, and most suppliers don't even stock it because the synthesis is annoying.

39 amino acids. 4814 Da. Research dosing: 2.5–15 mg SC weekly.

Length:
39 aa
MW:
4814 Da
Batch:
SA-0726-TIRZ-03
Availability: 10mg × 2 vials — Waitlist only
RETA-GLP
$7.00 / mg
Retatrutide analog. Triple agonist.
Metabolic Triple Rare

GLP-1R / GIPR / GCGR. Highest-margin item. Limited global suppliers because the sequence is long and the synthesis yield is punishing.

Strongest efficacy in the GLP class. Weight loss 15–22% in model systems. 43 amino acids. ~5000 Da.

Length:
43 aa
MW:
~5000 Da
Batch:
SA-0726-RETA-01
Availability: 50mg × 1 vial — By inquiry only
Category 02

Walter W. Specials

Propiolamide-modified peptides. Reversible covalent warheads extending duration from hours to weeks. Patentable as novel chemical entities. Not available from any other supplier.

The Technology

The Propiolamide Warhead

Standard peptides degrade within minutes to hours in plasma. The propiolamide warhead is an N-propargylacrylamide derivative — a Michael acceptor with moderated electron-withdrawing character. When it encounters a nucleophilic thiol (cysteine) or amine (lysine) on the target receptor, it undergoes Michael addition, forming a covalent adduct.

Crucially: this bond is reversible. The adduct hydrolyzes over 2–4 weeks, releasing the drug without permanent receptor damage. Think Velcro, not superglue. The receptor itself becomes the depot — no albumin binding, no large injection volumes, no albumin interference.

Reversible Covalence

Michael addition to Cys / Lys residues. Bond hydrolyzes with t½ of 2–4 weeks. No permanent adduct, no receptor damage.

Extended Duration

Receptor occupancy maintained for 14–28 days per dose. Single injection replaces daily or weekly regimens.

Clean Safety Profile

Does not cross the BBB when attached to large peptides (>800 Da). Does not alkylate DNA. No permanent off-target adducts.
SEMAX-PL
$75 / 5mg
Propiolamide-Semax. BDNF/TrkB activation via reversible thioether.
Walter W. Special Nootropic Synthesis Validated

Semax scaffold + N-terminal acetyl-propiolamide. Covalent attachment to TrkB extracellular domain cysteines (Cys345, Cys300 in CRD2). Prevents ligand dissociation, extending ERK1/2 and PI3K/Akt signaling for weeks.

Scaffold:
Semax (ACTH 4-7 analog)
Warhead:
N-acetyl-propiolamide
Batch:
SA-0726-SMXPL-01
Services

Consulting & Custom Synthesis

Deliverable-based engagements. Not vibes. Not workshops. Compounds, data, and documentation.

Target-to-Compound Consulting

Four-phase model. Standalone or full pipeline.
From target validation through preclinical validation with organoid studies.
Access

Request Entry

No automated checkout. Every order reviewed by the synthesis team.
Research Use Only — Not For Human Consumption