The Ghrelin, with the CAS registry number 304853-26-7, is also known as Obestatin. This chemical's molecular formula is C₁₄₉H₂₄₉N₄₇O₄₂ and molecular weight is 3370.86106. Ghrelin is a hormone produced mainly by P/D1 cells lining the fundus of the human stomach and epsilon cells of the pancreas that stimulates hunger. Ghrelin is also produced in the hypothalamic arcuate nucleus, where it stimulates the secretion of growth hormone from the anterior pituitary gland. Ghrelin exists in an endocrinological inactive (pure peptide) and an active (octanoylated) form (see hexatropin).

Physical properties of Ghrelin: (1)XLogP3-AA: -18.3; (2)H-Bond Donor: 48; (3)H-Bond Acceptor: 50; (4)Rotatable Bond Count: 121; (5)Tautomer Count: 1001; (6)Exact Mass: 3369.88268; (7)MonoIsotopic Mass: 3368.879325; (8)Topological Polar Surface Area: 1470; (9)Heavy Atom Count: 238; (10)Formal Charge: 0; (11)Complexity: 7800; (12)Isotope Atom Count: 0; (13)Defined Atom StereoCenter Count: 27; (14)Undefined Atom StereoCenter Count: 0; (15)Defined Bond StereoCenter Count: 0; (16)Undefined Bond StereoCenter Count: 0; (17)Covalently-Bonded Unit Count: 1.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: CCCCCCCC(=O)OCC(C(=O)NC(CC1=CC=CC=C1)C(=O)NC(CC(C)C)C(=O)NC(CO)C(=O)N2CCCC2C(=O)NC(CCC(=O)O)C(=O)NC(CC3=CNC=N3)C(=O)NC(CCC(=O)N)C(=O)NC(CCCNC(=N)N)C(=O)NC(C(C)C)C(=O)NC(CCC(=O)N)C(=O)NC(CCC(=O)N)C(=O)NC(CCCNC(=N)N)C(=O)NC(CCCCN)C(=O)NC(CCC(=O)O)C(=O)NC(CO)C(=O)NC(CCCCN)C(=O)NC(CCCCN)C(=O)N4CCCC4C(=O)N5CCCC5C(=O)NC(C)C(=O)NC(CCCCN)C(=O)NC(CC(C)C)C(=O)NC(CCC(=O)N)C(=O)N6CCCC6C(=O)NC(CCCNC(=N)N)C(=O)O)NC(=O)C(CO)NC(=O)CN
(2)Isomeric SMILES: CCCCCCCC(=O)OC[C@@H](C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(=O)N2CCC[C@H]2C(=O)N[C@@H](CCC(=O)O)C(=O)N[C@@H](CC3=CNC=N3)C(=O)N[C@@H](CCC(=O)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](C(C)C)C(=; (11)O)N[C@@H](CCC(=O)N)C(=O)N[C@@H](CCC(=O)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N; (12)[C@@H](CCCCN)C(=O)N[C@@H](CCC(=O)O)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N4CCC[C@H]4C(=O)N5CCC[C@H]5C(=O)N[C@@H](C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(=O)N)C(=O)N6CCC[C@H]6C(=O)N[C@@H](CCCNC(=N)N)C(=O)O)NC(=O)[C@H](CO)NC(=O)CN
(3)InChI: InChI=1S/C149H249N47O42/c1-9-10-11-12-16-45-118(209)238-78-106(191-135(225)103(75-197)171-115(204)73-154)137(227)187-101(71-84-32-14-13-15-33-84)133(223)186-100(70-81(4)5)132(222)190-105(77-199)144(234)194-66-29-42-108(194)139(229)180-95(51-57-117(207)208)128(218)188-102(72-85-74-165-79-169-85)134(224)179-92(47-53-112(156)201)126(216)175-90(39-26-63-167-148(161)162)130(220)192-119(82(6)7)141(231)181-93(48-54-113(157)202)127(217)177-91(46-52-111(155)200)125(215)174-89(38-25-62-166-147(159)160)122(212)173-87(35-18-22-59-151)121(211)178-94(50-56-116(205)206)129(219)189-104(76-198)136(226)176-88(36-19-23-60-152)123(213)182-96(37-20-24-61-153)142(232)196-68-31-44-110(196)145(235)195-67-30-41-107(195)138(228)170-83(8)120(210)172-86(34-17-21-58-150)124(214)185-99(69-80(2)3)131(221)183-97(49-55-114(158)203)143(233)193-65-28-43-109(193)140(230)184-98(146(236)237)40-27-64-168-149(163)164/h13-15,32-33,74,79-83,86-110,119,197-199H,9-12,16-31,34-73,75-78,150-154H2,1-8H3,(H2,155,200)(H2,156,201)(H2,157,202)(H2,158,203)(H,165,169)(H,170,228)(H,171,204)(H,172,210)(H,173,212)(H,174,215)(H,175,216)(H,176,226)(H,177,217)(H,178,211)(H,179,224)(H,180,229)(H,181,231)(H,182,213)(H,183,221)(H,184,230)(H,185,214)(H,186,223)(H,187,227)(H,188,218)(H,189,219)(H,190,222)(H,191,225)(H,192,220)(H,205,206)(H,207,208)(H,236,237)(H4,159,160,166)(H4,161,162,167)(H4,163,164,168)/t83-,86-,87-,88-,89-,90-,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,102-,103-,104-,105-,106-,107-,108-,109-,110-,119-/m0/s1
(4)InChIKey: GNKDKYIHGQKHHM-RJKLHVOGSA-N