PSMA-ALB-56

• CAT Number: I045268
• CAS Number: 2306049-48-7
• Molecular Formula: C66H95N11O18
• Molecular Weight: 1330.52
• Purity: ≥95%
• Synonyms: (2S)-2-[[(1S)-1-carboxy-5-[[(2S)-2-[[4-[[[(2S)-6-[4-(4-methylphenyl)butanoylamino]-2-[[2-[4,7,10-tris(carboxymethyl)-1,4,7,10-tetrazacyclododec-1-yl]acetyl]amino]hexanoyl]amino]methyl]cyclohexanecarbonyl]amino]-3-naphthalen-2-ylpropanoyl]amino]pentyl]carbamoylamino]pentanedioic acid
• InChI: InChI=1S/C66H95N11O18/c1-44-15-17-45(18-16-44)9-8-14-55(78)67-27-6-4-12-51(70-56(79)40-74-29-31-75(41-58(82)83)33-35-77(43-60(86)87)36-34-76(32-30-74)42-59(84)85)62(89)69-39-46-19-23-49(24-20-46)61(88)71-54(38-47-21-22-48-10-2-3-11-50(48)37-47)63(90)68-28-7-5-13-52(64(91)92)72-66(95)73-53(65(93)94)25-26-57(80)81/h2-3,10-11,15-18,21-22,37,46,49,51-54H,4-9,12-14,19-20,23-36,38-43H2,1H3,(H,67,78)(H,68,90)(H,69,89)(H,70,79)(H,71,88)(H,80,81)(H,82,83)(H,84,85)(H,86,87)(H,91,92)(H,93,94)(H2,72,73,95)/t46?,49?,51-,52-,53-,54-/m0/s1
• InChIKey: QIWYPMRCMDYQBF-OWCMGUGRSA-N
• SMILES: CC1=CC=C(C=C1)CCCC(=O)NCCCCC(C(=O)NCC2CCC(CC2)C(=O)NC(CC3=CC4=CC=CC=C4C=C3)C(=O)NCCCCC(C(=O)O)NC(=O)NC(CCC(=O)O)C(=O)O)NC(=O)CN5CCN(CCN(CCN(CC5)CC(=O)O)CC(=O)O)CC(=O)O

PSMA-ALB-56 is a PSMA-targeting radioligand designed by combining the glutamate-urea PSMA-binding entity and an albumin binder[1].
PSMA-ALB-56 accumulates much faster in tumor tissues and is more efficiently cleared from the blood and background tissues, which results in excellent tumor-to-background contrast already 4 hours after injection. PSMA-ALB-56 increases median survival in mice[1].

Reference

[1]. Umbricht CA, et al. Preclinical Development of Novel PSMA-Targeting Radioligands: Modulation of Albumin-Binding Properties To Improve Prostate Cancer Therapy. Mol Pharm. 2018;15(6):2297-2306.
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