Filling an associated array of associated arrays

[Jamie via Digitalmars-d-learn]

I'm trying to initialise an associated array of associated arrays 
with values, taking the same approach I would for an associated 
array:

string[string][string] table = [
    "info" : [
        "equation" : "H2 + I2 <=> 2HI",
        "type" : "elementary",
        ],
    "frc" : [
        "A" : "1.2e9",
        "n" : "1.2e9",
        "C" : "1.2e9",
        ],
    ];
But I'm getting the error `Not an associative array initializer'.
Is there a way to do this in the fashion that I'm trying?

I can declare it like

string[string][string] table;
table["info"]["equation"] = "H2 + I2 <=> 2HI";
table["info"]["type"] = "elementary";

But don't see why the first way wouldn't work.