PT-141

Identity

Field	Value
IUPAC name	(3S,6S,9R,12S,15S,23S)-15-[[(2S)-2-acetamidohexanoyl]amino]-9-benzyl-6-[3-(diaminomethylideneamino)propyl]-12-(1H-imidazol-5-ylmethyl)-3-(1H-indol-3-ylmethyl)-2,5,8,11,14,17-hexaoxo-1,4,7,10,13,18-hexazacyclotricosane-23-carboxylic acid
SMILES	CCCC[C@@H](C(=O)N[C@H]1CC(=O)NCCCC[C@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@H](NC(=O)[C@@H](NC1=O)CC2=CN=CN2)CC3=CC=CC=C3)CCCN=C(N)N)CC4=CNC5=CC=CC=C54)C(=O)O)NC(=O)C
InChI	InChI=1S/C50H68N14O10/c1-3-4-16-35(58-29(2)65)43(67)64-41-25-42(66)54-20-11-10-18-37(49(73)74)60-46(70)39(23-31-26-56-34-17-9-8-15-33(31)34)62-44(68)36(19-12-21-55-50(51)52)59-45(69)38(22-30-13-6-5-7-14-30)61-47(71)40(63-48(41)72)24-32-27-53-28-57-32/h5-9,13-15,17,26-28,35-41,56H,3-4,10-12,16,18-25H2,1-2H3,(H,53,57)(H,54,66)(H,58,65)(H,59,69)(H,60,70)(H,61,71)(H,62,68)(H,63,72)(H,64,67)(H,73,74)(H4,51,52,55)/t35-,36-,37-,38+,39-,40-,41-/m0/s1
InChIKey	FFHBJDQSGDNCIV-MFVUMRCOSA-N

Field	Value
Compound class	Cyclic heptapeptide (α-MSH analog)
Formula	C₅₀H₆₈N₁₄O₁₀
Molecular weight	1025.16
CAS	189691-06-3 \| 1607799-13-2 (acetate)
PubChem	PubChem CID 9941379 (opens in a new tab)

Computed conformer: one plausible shape of a flexible molecule, not a measured structure · RDKit

Additional properties

Computed
Property	Value
Exact mass	1024.52428442 Da
Monoisotopic mass	1024.52428442 Da
XLogP3	0.7
Topological polar surface area	379 Å²
Hydrogen bond donors	13
Hydrogen bond acceptors	12
Rotatable bonds	17
Heavy atoms	74

Also known as

Bremelanotide, Bremelanotida, Bremelanotidum, PT-141 (Bremelanotide), Bremelanotide PT 141

Identifiers

Sources

Data sources
Source	Kind	Retrieved
PubChem CID 9941379 (opens in a new tab)	PubChem	Oct 12, 2026
Computed conformer (RDKit ETKDGv3 + MMFF94)	Internal	Oct 12, 2026

Products containing this compound

Listed products
Product	Milligrams
PT-141	entire fill