Stata to R conversion mlogit

I know R fairly well but have very little experience with STATA. I am trying to convert the below mlogit command in Stata so it is usable in R. Can anyone help me?

mlogit conflict lc1 lc2 ltsc0 ltsc1 ltsc2 loi loic1 loic2 lois0 let letc1 letc2 lets0 lli limc1 limc2 lims0 lyo lyoc1 lyoc2 lyos0 llpo lpoc1 lpoc2 lpos0 led ledc1 ledc2 leds0 llin ledn lyon lnc1 lnc1c1 lnc1c2 lnc1ts0 r4 r6 r7 if year >= 1970 & year <= 2009,baseoutcome(0) cons(107/110 115/120 145/156 99/100)


Well, it's a constrained multinomial logit model. The left hand side variable is conflict, and everything from lc1 to r7 are right hand side variables. The analysis is restricted to the years 1970-2009. The base outcome (for conflict) is zero.

There are a large number of constraints (107 to 110, 115 to 120 etc). To see what these constraints actually are, you can type:
constraint list