Solid forms of (2s,3s,4s,5r,6s)-3,4,5-trihydroxy-6-(((4ar,10ar)-7-hydroxy-1-propyl-1,2,3,4,4a,5,10,10a-octahydrobenzo[g]quinolin-6-yl)oxy)tetrahydro-2h-pyran-2-carboxylic acid

2-18. (canceled)

A solid form of a compound of formula (Id),

• wherein said solid form is a crystal form exhibiting a weight loss of less than 1% w/w compared to the initial weight when heated from about 30° C. to about 150° C. (heating rate 10° C./min).

A solid form of a compound of formula (Id),

• wherein said solid form is a crystal form characterized by thermogravimetric analysis (heating rate 10° C./min) essentially as depicted in FIG. 9b.

A solid form of a compound of formula (Id),

• wherein said solid form is a crystal form characterized by an x-ray powder diffraction pattern as obtained using CuKα1 radiation (λ=1.5406 Å) comprising peaks at the following 2θ-angles±0.2° 2θ:
• 8.5, 12.4, 12.9, 15.6, 16.7, 18.9, 19.3, 20.0, 21.2, 21.5, 22.2, 23.0, 24.2, 27.3 and 28.3°.

The solid form of a compound of formula (Id),

• wherein said solid form is a crystal form characterized by an x-ray powder diffraction pattern as obtained using CuKα1 radiation (λ=1.5406 Å) comprising peaks at the following 2θ-angles±0.1° 2θ:
• 8.5, 12.4, 12.9, 15.6, 16.7, 18.9, 19.3, 20.0, 21.2, 21.5, 22.2, 23.0, 24.2, 27.3 and 28.3°.