Bacardi Vanilla Rum

Vanilla is a spice derived from orchids of the genus Vanilla, the spice is obtained from the pods of the Mexican species of flat leaved Vanilla. The characteristic flavour of Vanilla comes from the aromatic compound Vanillin. Up to 85% of a vanilla essential oil is Vanillin.
Natural vanilla flavour is in pure form, a little more complex than plain Vanillin, but most of the times the Vanillin is what is needed to release that familiar flavour in a drink.
Note that when a drink asks for Vanilla extract, it means an extract of real Vanilla from Vanilla pods in an alcoholic suspension and is usually less processes and stronger, while Vanilla Flavour or Vanilla Essence is a processed product made using artificial flavours and colours. While a Vanilla syrup is a sweetened thick condiment with either real organic vanilla flavour or artificial vanilla flavouring.
The thumbs rule is, if you run out of Vanilla extract, go for Maple syrup as a replacement. Also note that artificial vanilla is strong and artificial vanilla flavour comes from Castoreum, a chemical compound that comes from a beaver's castor sacs, which are located between the pelvis and the base of the tail.

Absolut

Absolut Citron Vodka is one of the main flavour variants of Absolut Vodka. Citron means lemon in Swedish, Absolut Citron is crafted from Swedish Winter wheat and water from a deep well in Ahus, the vodka is flavoured with citrus fruits.

It is a 40% ABV Vodka made from natural ingredients and no sugar is added to the pure Vodka during the flavour infusion, the taste is thus smooth and mellow, with a fresh lemon and lime flavour with a lemon peel note.

Raspberry Liqueur

Raspberry Liqueur is what a liqueur is, a neutral liquor, wine or gin with added flavours and sweetness from fruits, herbs and other ingredients.

In Raspeberry Liqueur, raspberries are macerated with sugar in vodka, and vanilla pods are often added for a wider flavour profile, alcohol and sugar draw out the fruit's natural juices and essential oils into the spirit.

Few popular raspberry liqueur brands would be

• 1. Chambord Black Raspberry Liqueur.
• 2. Bols Black Raspberry Liqueur.
• 3. Giffard Framboise Liqueur.
• 4. St George's Raspberry Liqueur.
• 5. Mathilde Framboise Liqueur.

Blue Curacao

Curaçao is a liqueur flavored with the dried peel of the bitter orange laraha. It's been a popular liqueur for more than 150 years, the Dutch East India Company created this orange liqueurs by steeping orange peels in alcohol from the island of Curaçao and called it Curaçao liquor, unlike Triple Sec, Curacao has added spices and herbs to the orange and Curaçao comes in a variety of colours such as clear, orange or blue.

Blue Curaçao being the most used of them, in cocktails. Although Curacao is an orange tinted liquor, Blue Curacao is a regular Curacao dyed bright blue to give it a striking appearance, and thus is a very popular cocktail mixer, whenever a striking colour is desired.

Blue Curacao is usually around 25% ABV.

Blue Curacao is essentially Orange Liqueur tinted Blue, the colour doesn't influence the taste and thus Orange Curacao is interchangeable with Blue Curacao in recipes, if the colour is not important in the appearance.

NOTE: Blue Curacao being an Orange Flavoured Blue Liqueur, it's primary purpose in a cocktail is introducing the Orange flavour and the striking sky blue to the drink, so, if a bottle of Blue Curacao liqueur is something you are not planning to buy right now, you can manage with the Blue Curacao Syrup.
It would add the same flavour and colour profile to the cocktail, all we need to do is simply count for the alcohol absent in the syrup and account for it.