A process for the manufacture 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

A process for the manufacturing of compound (A3) below comprising the following step

• reacting compound (A2) with (2S,3S,4S,5R,6R)-2-(methoxycarbonyl)-6-(2,2,2-trichloro-1-iminoethoxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate to obtain compound (A3) according to the reaction scheme below
• wherein said reaction takes place in an aprotic solvent in the presence of a Lewis acid.

A compound of formula (A3) below

• or a salt thereof.

(canceled)

A process for the preparation of compound (Id), or a pharmaceutically acceptable salt thereof with the formula below

• from compound (I) with the formula below
• wherein said process comprises the following step
• deprotecting compound (A3) by contacting compound (A3) with a nucleophilic reagent to obtain compound (Id), or a pharmaceutically acceptable salt thereof according to the reaction scheme below

(canceled)

(canceled)