The D-Galacto-D-mannan, with the CAS registry number 11078-30-1, is also known as Galactomannan. Its EINECS number is 234-299-6. This chemical's molecular formula is C₁₈H₃₂O₁₆ and molecular weight is 504.44. What's more, its IUPAC name is (2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-[[(2R,3S,4R,5S,6R)-4,5,6-trihydroxy-3-[(2S,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]oxane-3,4,5-triol.

Physical properties of D-Galacto-D-mannan are: (1)ACD/LogP: -5.88; (2)# of Rule of 5 Violations: 3; (3)ACD/LogD (pH 5.5): -5.88; (4)ACD/LogD (pH 7.4): -5.88; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 16; (10)#H bond donors: 11; (11)#Freely Rotating Bonds: 18; (12)Polar Surface Area: 147.68 Å²; (13)Index of Refraction: 1.673 ; (14)Molar Refractivity: 104.52 cm³; (15)Molar Volume: 278.7 cm³; (16)Polarizability: 41.43×10^-24cm³; (17)Surface Tension: 119.1 dyne/cm; (18)Density: 1.8 g/cm³; (19)Flash Point: 474.4 °C; (20)Enthalpy of Vaporization: 142.19 kJ/mol; (21)Boiling Point: 860.9 °C at 760 mmHg; (22)Vapour Pressure: 1.53E-34 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: C(C1C(C(C(C(O1)OCC2C(C(C(C(O2)O)O)O)OC3C(C(C(C(O3)CO)O)O)O)O)O)O)O
(2)Isomeric SMILES: C([C@@H]1[C@@H]([C@@H]([C@H]([C@H](O1)OC[C@@H]2[C@H]([C@@H]([C@@H]([C@@H](O2)O)O)O)O[C@H]3[C@H]([C@H]([C@@H]([C@H](O3)CO)O)O)O)O)O)O)O
(3)InChI: InChI=1S/C18H32O16/c19-1-4-7(21)9(23)13(27)17(32-4)30-3-6-15(11(25)12(26)16(29)31-6)34-18-14(28)10(24)8(22)5(2-20)33-18/h4-29H,1-3H2/t4-,5-,6-,7+,8-,9+,10+,11-,12+,13-,14+,15-,16-,17+,18+/m1/s1
(4)InChIKey: OMDQUFIYNPYJFM-XKDAHURESA-N