The Gentamycin is an organic compound with the formula C₂₁H₄₃N₅O₇. The IUPAC name of this chemical is 2-[4,6-diamino-3-[3-amino-6-[1-(methylamino)ethyl]oxan-2-yl]oxy-2-hydroxycyclohexyl]oxy-5-methyl-4-(methylamino)oxane-3,5-diol. With the CAS registry number 1403-66-3, it is also named as (1R,2S,3S,4R,6S)-4,6-diamino-3-{[3-deoxy-4-C-methyl-3-(methylamino)-β-L-arabinopyranosyl]oxy}-2-hydroxycyclohexyl 2-amino-2,3,4,6,7-pentadeoxy-6-(methylamino)-β-L-lyxo-heptopyranoside. The product's classification codes are Drug / Therapeutic Agent; Human Data; Mutation data; Natural Product; Reproductive Effect.The Gentamycin is a complex of three different closely related aminoglycoside sulfates, Gentamicins C1, C2, and C1(subA), obtained from Micromonospora purpurea and related species. They are broad-spectrum antibiotics, but may cause ear and kidney damage. They act to inhibit protein synthesis .

Physical properties about Gentamycin are:
 (1)ACD/LogP: -1.89; (2)# of Rule of 5 Violations: 2; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 1; (6)ACD/KOC (pH 7.4): 1; (7)#H bond acceptors: 12; (8)#H bond donors: 11; (9)#Freely Rotating Bonds: 13; (10)Polar Surface Area: 80.81 Å²; (11)Index of Refraction: 1.583; (12)Molar Refractivity: 122.64 cm³; (13)Molar Volume: 366.8 cm³; (14)Polarizability: 48.61×10^-24cm³; (15)Surface Tension: 62.7 dyne/cm; (16)Density: 1.3 g/cm³; (17)Flash Point: 358.6 °C; (18)Enthalpy of Vaporization: 112.58 kJ/mol; (19)Boiling Point: 669.4 °C at 760 mmHg; (20)Vapour Pressure: 8.85E-21 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: O[C@]3(C)[C@H](NC)[C@@H](O)[C@@H](O[C@H]2[C@H](N)C[C@H](N)[C@@H](O[C@H]1O[C@H](C(NC)C)CC[C@H]1N)[C@@H]2O)OC3
(2)InChI: InChI=1/C21H43N5O7/c1-9(25-3)13-6-5-10(22)19(31-13)32-16-11(23)7-12(24)17(14(16)27)33-20-15(28)18(26-4)21(2,29)8-30-20/h9-20,25-29H,5-8,22-24H2,1-4H3/t9?,10-,11+,12-,13+,14+,15-,16-,17+,18-,19-,20-,21+/m1/s1
(3)InChIKey: CEAZRRDELHUEMR-URQXQFDEBJ
(4)Std. InChI: InChI=1S/C21H43N5O7/c1-9(25-3)13-6-5-10(22)19(31-13)32-16-11(23)7-12(24)17(14(16)27)33-20-15(28)18(26-4)21(2,29)8-30-20/h9-20,25-29H,5-8,22-24H2,1-4H3/t9?,10-,11+,12-,13+,14+,15-,16-,17+,18-,19-,20-,21+/m1/s1
(5)Std. InChIKey: CEAZRRDELHUEMR-URQXQFDESA-N

The toxicity data is of Gentamicin as follows: